JP2018090008A - Vehicle front structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle front structure capable of using simple means to properly prevent such a phenomenon that a brake booster is pushed into a vehicle interior at the time of forward collision of a vehicle.SOLUTION: A vehicle front structure A has a brake booster 4, a suspension tower 5, and a rigid component 6 disposed along a front side member 7 extending in the fore-and-aft direction of a vehicle in a vehicle front part. The vehicle front structure includes a guide member 80 that moves or guides the rigid component 6 in a direction receding from the suspension tower 5 in a vehicle width direction or vertical height direction when the rigid component 6 withdraws toward the rear part of the vehicle due to load input from forward the vehicle.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle front structure such as an automobile.

As a specific example of the vehicle front structure, there is a structure described in Patent Document 1.
In the structure described in this document, a suspension tower is arranged on the vehicle front side of a brake booster attached to a dash panel that partitions an engine room and a vehicle compartment at the front of the vehicle. Further, a hydraulic control unit including an electric negative pressure pump for increasing the negative pressure inside the brake booster is disposed further to the vehicle front side of the suspension tower. These brake booster, suspension tower, and hydraulic control unit are arranged along the front side member.
In Patent Document 1, even if the hydraulic piping connected to the hydraulic control unit is devised and the front side member is deformed at the time of a frontal collision of the vehicle, the hydraulic piping is not easily damaged due to this deformation. Thus, the normal function of the brake can be maintained as much as possible due to damage to the hydraulic piping.

  However, the prior art still has room for improvement as described below.

That is, when the front part of the vehicle crashes due to the frontal collision of the vehicle, the phenomenon that the brake booster is pushed into the vehicle compartment side needs to be avoided as much as possible from the viewpoint of occupant protection.
On the other hand, in the prior art, the brake booster, the suspension tower, and the hydraulic control unit are arranged along the front side member. For this reason, when the front part of the vehicle crashes at the time of a frontal collision, the suspension tower is sandwiched between the hydraulic control unit and the brake booster. If such a situation occurs, the load received by the hydraulic control unit at the time of the frontal collision of the vehicle is easily input to the brake booster via the suspension tower. That is, when the hydraulic control unit moves backward due to a load input at the time of a frontal collision of the vehicle, the suspension tower is pushed to the rear side of the vehicle. Then, this suspension tower pushes the brake booster further to the vehicle rear side. This makes it easier for the brake booster to move backward.
In addition, for example, a radiator support is generally attached to the front part of the front side member, and when the vehicle body member of the front part of the vehicle such as the front side member crashes at the time of front collision of the vehicle, The radiator support may hit the hydraulic control unit. However, in the prior art, the hydraulic control unit is sandwiched between the radiator support and the suspension tower at the time of the crash. Therefore, the crash stroke of the vehicle body member such as the front side member is shortened by the amount corresponding to such a state. This is not preferable for reducing the reverse amount of the brake booster.

JP 2014-227153 A

The present invention has been conceived under the circumstances as described above, and a vehicle capable of appropriately preventing a phenomenon in which a brake booster is pushed into a vehicle compartment at the time of a frontal collision of the vehicle by a simple means. The challenge is to provide a front structure.

  In order to solve the above problems, the present invention takes the following technical means.

The vehicle front structure provided by the present invention includes a brake booster attached to a dash panel, a suspension tower located on the vehicle front side of the brake booster, and a rigid part located on the vehicle front side of the suspension tower, The brake booster, the suspension tower, and the rigid body part are vehicle front structures arranged along a front side member extending in the vehicle front-rear direction at the vehicle front, And a guide member for moving and guiding the rigid body part in a vehicle width direction or a vertical height direction away from the suspension tower when the rigid body part moves backward with respect to the vehicle by a load input from the vehicle. It is characterized by that.
Here, the above-mentioned “rigid body part” is a part having such rigidity that the suspension tower can be compressed and deformed when a frontal collision of the vehicle occurs and the vehicle is moved backward. For example, in addition to the hydraulic control unit having an electric negative pressure pump for increasing the negative pressure inside the brake booster as described in the prior art, instead of or in addition to the electric negative pressure pump, ABS (Antilock Brake System) and hydraulic control units equipped with hydraulic control equipment for VSC (Vehicle Stability Control), etc., as well as batteries.

According to the present invention, the following effects can be obtained.
That is, when a frontal collision of the vehicle occurs and a phenomenon occurs in which the rigid body part moves backward to the rear side of the vehicle due to the load input at the time of the forward collision, the rigid body part strongly pushes the suspension tower directly to the rear side of the vehicle. Pushing is avoided by the movement guide action by the guide member. Therefore, it is possible to appropriately prevent the phenomenon that the load received by the rigid parts is input to the brake booster via the suspension tower. In addition, when a member such as a radiator support provided at the front of the vehicle causes a phenomenon that pushes the rigid body part to the rear of the vehicle, the rigid body part is also prevented from being sandwiched between the member and the suspension tower. Is done. For this reason, it becomes possible to take the crash stroke of a vehicle front part longer than a prior art. For this reason, according to the present invention, it is possible to appropriately prevent or suppress the brake booster from being pushed into the passenger compartment when the vehicle collides.
In the present invention, a guide member for moving and guiding a rigid part is provided, but the configuration of this guide member can be simplified, and an increase in manufacturing cost and an increase in weight are appropriately suppressed. It is also possible to do.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

It is a principal part perspective view which shows schematic structure of an example of the vehicle front part structure which concerns on this invention. It is a principal part schematic plan view of FIG. (A), (b) is operation | movement explanatory drawing of the structure shown in FIG. (A) is a principal part top view of the attachment location of the hydraulic control unit of the structure shown to FIG. 1 and FIG. 2, (b) is a principal part exploded plan view of (a). (A) is a principal part side view of the attachment location of the hydraulic control unit of the structure shown to FIG. 1 and FIG. 2, (b) is a principal part exploded side view of (a).

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  The vehicle front structure A shown in FIGS. 1 and 2 is positioned on the front side of the vehicle with respect to the brake booster 4 attached to the dash panel 3 that partitions the engine room 1 and the vehicle compartment 2. A suspension tower 5 provided in the engine room 1 for supporting struts of the front suspension and the like, and a hydraulic control unit 6 positioned on the vehicle front side of the suspension tower 5 are provided. The hydraulic control unit 6 corresponds to an example of a rigid part referred to in the present invention, and includes an electric negative pressure pump (not shown) for increasing the negative pressure inside the brake booster 4, hydraulic control equipment for ABS, VSC, and the like. These are provided and unitized (sometimes simply referred to as “actuators”).

  The brake booster 4, the suspension tower 5, and the hydraulic control unit 6 described above are provided along the front side member 7, and they overlap each other in the vehicle width direction and the vertical height direction. The front side member 7 is a member that is located on the outer side in the vehicle width direction of the front portion of the vehicle and extends in the vehicle front-rear direction. A vertical column portion of a radiator support (the whole view is not shown) is disposed on the front end side. 70 is joined.

The hydraulic control unit 6 is mounted and fixed using a bracket 8. The bracket 8 is integrally provided with a guide member 80 for guiding the movement of the hydraulic control unit 6 at the time of a vehicle front collision. It is connected to.
More specifically, as shown in FIG. 1, the bracket 8 has a plurality of attachment pieces 81 a and 81 b, through which to the front side member 7 and the lower side wall 5 a of the suspension tower 5. Is fixed. The upper portion of the bracket 8 is configured as shown in FIGS. 4 and 5, and a support plate portion 82 for mounting and supporting the hydraulic control unit 6, the hydraulic control unit 6 and the bracket 8 are connected via bolts 83 and the like. Fixed connection pieces 84a and 84b for fixed connection are provided.

  The guide member 80 is formed as a plate-like protrusion that rises upward from the support plate portion 82 of the bracket 8, and is located outward of the hydraulic control unit 6 in the vehicle width direction, and its tip portion is hydraulically controlled. It is formed so as to protrude rearward from the unit 6 relative to the vehicle. In the plan view shown in FIG. 4, the distal end region of the guide member 80 is an inclined portion 80 a that is inclined at an appropriate angle θ so that the portion on the vehicle rear side is located on the inner side in the vehicle width direction. Preferably, the tip of the inclined portion 80a is rounded with an appropriate curvature radius R.

  As shown in FIG. 5B, the base end portion 80b of the guide member 80 is a narrow region having a narrow width W compared to other portions, and the guide member 80 has a load greater than or equal to a predetermined value. When the operation is performed, the position of the base end portion 80 b is broken and the guide member 80 is separated from the bracket 8. The base end portion 80 b corresponds to the weakened portion of the guide member 80.

  As shown in FIG. 2, the guide member 80 is located so as to be interposed between the hydraulic control unit 6 and the suspension tower 5. Preferably, the tip of the inclined portion 80a of the guide member 80 is set so as to be located on the inner side in the vehicle width direction of the suspension tower 5.

  Next, the operation of the vehicle front structure will be described.

First, when a frontal collision of the vehicle occurs and a load F is input from the front of the vehicle as shown in FIG. 3A, the radiator support is pushed to the rear of the vehicle, and the front side member 7 is compressed and deformed. To do. Accordingly, the hydraulic control unit 6 and its bracket 8 are also retracted toward the vehicle rear side, and the inclined portion 80a of the guide member 80 comes into pressure contact with the corner portion of the suspension tower 5 and the like. Then, the guide member 80 is separated from the bracket 8 by dividing the base end portion 80b which is a fragile portion, while the hydraulic control unit 6 is still retracted together with the bracket 8 in a state where the guide member 80 is separated.

  However, in this case, the hydraulic control unit 6 is guided to move inward in the vehicle width direction as shown by the arrow Na in FIG. The suspension tower 5 does not overlap in the vehicle width direction. As a result, it is appropriately avoided that the hydraulic control unit 6 abuts against the suspension tower 5 and compresses and deforms the suspension tower 5. As a result, when the suspension tower 5 is pushed rearward by the hydraulic control unit 6, the brake booster 4 is pushed further rearward and pushed into the passenger compartment 2 is appropriately eliminated. Further, since it is possible to avoid the hydraulic control unit 6 being sandwiched between the vertical column portion 70 of the radiator support and the suspension tower 5, the crash stroke of the vehicle body component at the front portion of the vehicle such as the front side member 7 is avoided. It is also possible to take longer. Therefore, it is more preferable to prevent the brake booster 4 from being pushed into the vehicle compartment 2.

As described above, when the hydraulic control unit 6 is retracted, the guide member 80 is separated from the bracket 8, and it is avoided that the guide member 80 is largely retracted to the vehicle rear side along with the hydraulic control unit 6. The separated guide member 80 can be fixed in contact with the side surface of the suspension tower 5 when the hydraulic control unit 6 moves backward, and the hydraulic control unit 6 can be fixed inward in the vehicle width direction. Thus, it is possible to obtain the action of ensuring that the movement guide is performed.
However, the present invention is not limited to this, and the guide member 80 may be configured not to be separated from the bracket 8. Even in this case, the intended effect of the present invention can be obtained.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the vehicle front structure according to the present invention can be variously modified within the range intended by the present invention.

In the above-described embodiment, the guide member 80 is provided on the bracket 8 of the hydraulic control unit 6, but the position where the guide member is provided in the present invention is not limited to this. In the present invention, for example, the suspension tower may be provided on the side surface of the suspension tower, or may be provided in a place other than this.
Further, the guide member is not limited to a guide that moves away from the suspension tower in the vehicle width direction when the hydraulic control unit (rigid body part) moves backward, but as a guide that moves away from the vertical height direction. It can also be configured. Specifically, when the hydraulic control unit (rigid body part) moves backward, the hydraulic control unit does not push the suspension tower backward by guiding the hydraulic control unit to move upward (or downward) from the suspension tower. You may do it.

  The definitions and specific examples of the rigid parts in the present invention are as described above, and are concepts including batteries and the like, and the specific types thereof are not limited.

A Vehicle front structure 3 Dash panel 4 Brake booster 5 Suspension tower 6 Hydraulic control unit (rigid part)
7 Front side member 80 Guide member

Claims (1)

Brake booster attached to the dash panel,
A suspension tower located on the vehicle front side of the brake booster,
A rigid part located on the vehicle front side of the suspension tower;
With
The brake booster, the suspension tower, and the rigid body part are vehicle front structures that are arranged along a front side member that extends in the vehicle front-rear direction at the vehicle front,
A guide member configured to move and guide the rigid body part away from the suspension tower in the vehicle width direction or the vertical height direction when the rigid body part moves backward in the vehicle rearward direction by a load input from the vehicle front side; The vehicle front part structure characterized by the above-mentioned.

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