JP3140506B2 - Car front body 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 front wheel rear member in which a front wheel located forward of a passenger compartment is crushed and deformed at the time of a collision of a vehicle, and a front wheel is located behind the front wheel due to the crushing deformation of the front body. The present invention relates to a front body structure of a corresponding automobile.

[0002]

2. Description of the Related Art In a general vehicle, a front body located in front of a passenger compartment in a collision from the front collapses,
The crushing of the front body absorbs impact energy at the time of a collision and prevents deformation of the cabin.

[0003] The collapse of the front body is generally
First, when the area in front of the vehicle body is crushed from the front wheel portion including the front wheel and the vehicle-body-side mounting portion of the front wheel suspension, and when the crushing cannot sufficiently absorb impact energy, the front wheel portion has high rigidity. If the front wheel does not collapse and the area behind the front wheel portion collapses until the front wheel hits a front wheel rear member such as a side sill located behind the front wheel, and if the impact energy is still not sufficiently absorbed by the collapse, the front wheel is strung. As a result, the front wheel rearwardly displaces or deforms the front wheel rear member to deform the vehicle compartment.

[0004] For example, in the case of a short nose vehicle in which the front body portion has a short front-to-rear body length, the front region and the rear region of the front wheel portion are short. It is difficult to ensure sufficient impact energy absorption capacity as the stroke is larger).

[0005] Therefore, if the crash stroke in the rear area can be increased without increasing the front-rear length of the vehicle body in the rear area of the front wheel portion, the short nose can be improved and the safety at the time of collision can be improved. In addition, even in the case of a vehicle other than a short nose vehicle, the crash stroke can be further increased to further improve safety.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a front body structure of an automobile which can increase a crash stroke in a rear region of a front body without increasing a front-rear length of the rear region of the front wheel portion. To provide.

[0007]

Front body structure for an automobile according to claim 1 of the present invention SUMMARY OF] In order to achieve the above object, at the time of collision of the vehicle, deformation collapse front body located forward of the vehicle body from the passenger compartment The front body structure of an automobile in which a front wheel hits a front wheel rear member located behind the front wheel due to crush deformation of the front body,
At the front of the front wheel tie rods
It is, the collision crush deformation of the front body of the vehicle
Bend the tie rod against the tie rod of the front wheel
Tie rods for rotating the front wheel to the left and right by deforming
A bending member, wherein the tie rod is
The contact point with the curved member is located forward with respect to the center axis of the front wheel.
It is characterized by being arranged so that it may be placed .

Further , a front body structure of an automobile according to claim 2 is provided.
In the event of a vehicle collision, the structure located in front of the vehicle
The front body collapses and deforms, and the front body collapses.
Front wheel rear portion where the front wheel is located behind the front wheel due to the deformation
The structure of the front body of the car corresponding to the material,
Member is a side sill, to the front body, vehicles
When the front wheel collapses due to the collision of
Front wheel rotating means for rotating the front wheel
The rotation means is formed at the front end of the side sill and has an impact.
Retract due to crushing deformation of the front body at the time of collision
Guide the front wheel to turn left and right against the front wheel
The inclined surface is in a straight running state.
The front wheel is opposed to almost the entire width of the front wheel.
And features.

Further, a front body of a vehicle according to claim 3 is provided.
The structure is located ahead of the cabin when the vehicle collides
The front body is crushed and deformed.
The front wheel is located behind the front wheel due to shake deformation.
The front body structure of an automobile corresponding to a member,
At the front body at two positions before and after the center axis
Suspension arm mounted to support the front wheel
And the front body collapses and deforms during a vehicle collision.
Displaced and deformed, resulting in 2
Front mounting position among the mounting positions on the front body
To the rear mounting position in the vehicle width direction to
Suspension having a displacement part for rotating the front wheel left and right
And a suspension arm moving member.
The displacement part of the moving member is located forward with respect to the center axis of the front wheel.
It is characterized by being arranged so that it may be placed.

[0010]

Front body structure for an automobile according to claim 1 of the effect of the present invention, as described above, before the front body crush deformation
Bending and deforming the tie rod against the tie rod
Tie rods bent to rotate the front wheels to the left and right by causing
Since the member is provided, the tie rod
The bending member causes the front wheel to rotate in one of the left and right directions (steering direction).

As described above, the front wheel retreat distance until the front wheel retreats at the time of a vehicle collision and begins to displace and deform the front wheel rear member rearward as a tension member is the crash stroke in the rear region of the front wheel portion. However, when the front wheel is rotated as described above, the rear end of the front wheel is disengaged from the front position of the front wheel rear member, that is, the front wheel is retracted from a position where the front wheel is a member that is in tension with the front wheel rear member. Even if it does not hit the front wheel rear member, or if it hits, it does not hit the front wheel rear member in such a way as to be displaced and deformed toward the rear of the vehicle body, or even if it turns, the rear end of the front wheel is still the front wheel rear member Even if the front wheel is still in a position where the front wheel is still a strut member with respect to the front wheel rear member, even if the front wheel rotates, the front wheel hits the front wheel rear member as compared to the case where the front wheel is in a straight running state. The retreat distance of the front wheel before the member starts to be displaced and deformed rearward becomes long.

That is, by rotating the front wheel at the time of the collision as described above, the retreat distance until the front wheel retreats and the front wheel rear member is displaced and deformed rearward, that is, a crash in the rear area of the front wheel portion. The stroke can be increased without lengthening the rear region, so that the impact absorption at the time of a collision from the front is improved.

In addition, the tie rod is a tie rod bent portion.
The contact point with the material is located forward with respect to the center axis of the front wheel.
The front wheel is retracted in the event of a collision.
The wheel can be quickly rotated,
The effect of increasing the peak is reliably obtained.

According to the second aspect of the present invention, when the front wheel retreats at the time of collision, the rear end of the front wheel is formed at the front end of the side sill.
The front wheel rotates and is guided by the inclined surface for guiding the front wheel, and the front wheel retreats from a position serving as a tension member. And, the above-mentioned inclined surface, with respect to the front wheels in the straight running state
The front wheels are opposed over almost the entire width of the front wheels.
The wheel securely contacts the slope, and the front wheel is securely
It can be turned left and right.

Further, according to the third aspect of the present invention, the suspension
The displacement part of the pension arm moving member moves the front mounting position of the suspension arm in the vehicle width direction with respect to the rear mounting position , whereby the front wheel rotates together with the suspension arm, and the front wheel becomes a tension member. The retreat distance of the front wheel until the vehicle retreats from the position or the front wheel hits the front wheel rear member becomes longer. Then, change the suspension arm moving member.
Position so that the front part is located forward with respect to the center axis of the front wheel
The front wheels must be
Can rotate quickly, increasing crash stroke
A great effect is surely obtained.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 show a first embodiment of the present invention. FIG. 1 is a bottom view, FIG. 2 is a front view, and FIG.
Is a side view, and FIG. 4 is a perspective view. Although the illustrated structure is the structure of the right front wheel side of the front body before the cabin, the left front wheel side (not shown) has the same structure as the right front wheel side.

In the illustrated front vehicle body structure (front body structure), a bumper 2 is disposed at the forefront, and a front frame 4 extending in the vehicle front-rear direction is provided behind the bumper 2. 4 (the left front frame is not shown) is connected by a cross member 6 extending in the vehicle width direction.

A wheel apron 8 is joined to the front frame 4. The wheel apron 8 has
A wheel house portion 8a and a suspension tower portion 8b are formed, and a wheel apron reinforcement 8c extending in the vehicle longitudinal direction is provided at an upper end portion.

A front wheel 10 is disposed in the wheel house portion 8a. The front wheel 10 is rotatably supported by a wheel supporting member 12 having an axle 12a. The wheel supporting member 12 is a double wishbone type suspension lower arm. 14 is rotatably connected to one end by a ball joint,
The other end of the suspension lower arm 14 is connected to a suspension cross member 16 extending in the vehicle width direction and joined to the left and right front frames 4. A steering rack 18 for steering the front wheels 10 at a position forward of the axle 12 with respect to the vehicle body is provided. The steering rack 18 includes a tie rod 20 connected to the wheel support member 12, and is adapted to handle a steering wheel. Then, the tie rod 20 is moved in the left-right direction in the drawing to rotate the wheel support member 12 to steer the front wheel 10, that is, to rotate the left-right direction.

A side sill 22 extending in the vehicle front-rear direction is provided outside the front frame 4 in the vehicle width direction, and the side sill 22 and the front frame 4 are connected by a torque box 24 at the rear end of the wheel house 8a. The front end of the side sill 22 is located behind the front wheel 10 and serves as a front wheel rear member.

The front body 26 constructed as described above
Is provided with a tie rod bending member 30 for rotating the front wheel 10 in the left-right direction, that is, in the steering direction, by crushing rearward of the front body 26 at the time of a collision from the front of the vehicle.

The tie rod bending member 30 is fixed to the lower surface of the wheel apron 8 at the same height as the tie rod 20 at a position in front of the tie rod 20 in the vehicle body. The tie rod bending member 30 is formed to be elongated in the longitudinal direction of the vehicle body so as to have high rigidity against a load in the longitudinal direction of the vehicle body, and the rear end of the vehicle body is formed in a semicircular shape or a mountain shape, as described below. When the bending member 30 hits and presses the tie rod 20, a load is efficiently applied to one point of the tie rod 20 so that the tie rod 20 is easily folded.

In the above-described structure, at the time of a vehicle collision, the area in front of the front wheel portion of the front body 26 (the front wheel 10 and the suspension arm 14 of the front wheel 10, especially the mounting range of the suspension arm 14 of the front frame 4) is crushed, whereby the tie rod The folding member 30 is retracted as shown by a two-dot chain line in FIG. 1, and the tie rod 20 is bent as shown by a two-dot chain line by the retracted tie rod bending member 30, and the wheel of the tie rod 20 is bent by folding the tie rod 20. Connection point 20 to support member 12
(a) moves inward in the vehicle width direction (20a '), whereby the front wheel 10 and the wheel support member 12 rotate outwardly in the vehicle width direction as shown by a two-dot chain line.

As shown by the solid line in FIG. 1, the front wheel 10 has a side sill 22 which is a front wheel rear member when it is in a straight running state.
Therefore, at the time of a vehicle collision, the front wheel 10 retreats and hits the front end of the side sill 22, and when the impact energy is not yet absorbed, the front wheel 10 further retreats and the side sill 22 is displaced rearward and deformed. Deformation occurs. That is, when the front wheel is in the straight traveling state, it is at the above-described position of the tension member.

However, when the front wheel 10 rotates as shown, the rear end of the front wheel 10 is displaced from the front position of the side sill 22, that is, the front wheel 10 retreats from the position serving as a tension member with respect to the side sill 22. When the front wheel 10 does not hit the side sill 22 even if the front wheel 10 moves backward, or when the front wheel 10 hits, the side sill 22 is not displaced and deformed toward the rear of the vehicle body. In contrast, the front wheel retreat distance until the side sill 22 hits the side sill 22 and begins to be displaced and deformed rearward, that is, the crash stroke in the area behind the front wheel portion (the crash stroke in the straight running state is indicated by S in the figure). Is longer).

Next, a second embodiment of the present invention will be described. In the second embodiment, the front wheel turning means for turning the front wheel 10 right and left is constituted by an inclined surface formed at the front end of a side sill 22 which is a front wheel rear member. Two modes will be described.

FIGS. 5, 6, and 9 show the first embodiment. FIG. 5 is a bottom view showing the state before the collision, FIG. 6 is a bottom view showing the state after the collision, and FIG. 9 is a perspective view showing the inclined surface in detail. As shown, in the first embodiment, the side sill 22 which is a front wheel rear member is provided.
An inclined surface 34 as a front wheel rotating means is formed at the front end of the vehicle. The inclined surface 34 is inclined outward in the vehicle width direction toward the rear of the vehicle body, and when the front wheel 10 retreats due to crushing deformation of the front body 26 at the time of a collision, as shown in FIG. The front wheel 10 is guided so that its rear end is turned outward in the vehicle width direction. The inclined surface 34 is formed by inclining a front end portion of the outer panel 38 of the inner panel 36 and the outer panel 38 constituting the side sill 22.

In the first embodiment, when the front wheel 10 retreats at the time of collision as described above, the front wheel 10 hits the inclined surface 34 at the front end of the side sill, and is guided by the inclined surface 34 so that the front wheel 10 rotates. Accordingly, the front wheel 10 is retracted from a position serving as a tension member with respect to the side sill 22, and therefore, as in the case of the first embodiment, the rear region of the front wheel portion is smaller than in the case where the front wheel 10 is in a straight running state before rotation. Crash stroke lengthens.

FIG. 7, 8 and 10 show a second embodiment, FIG. 7 is a bottom view showing a front collision, FIG. 8 is a bottom view showing a post-collision, FIG. 1
0 is a perspective view showing the inclined surface in detail. As shown, in the second embodiment, a reinforcing member 40 is provided between the inner panel 36 and the outer panel 38 at the front end of the side sill 22.
The front surface of the reinforcing member 40 is formed as an inclined surface 34 which is inclined outward in the vehicle width direction toward the rear of the vehicle body as shown in the figure, and the outer panel 38 is provided with a portion located outside the inclined surface 34. A bead 42 is formed for facilitating crushing.

In the second embodiment, the front wheel 10 at the time of collision
When the front wheel 10 is retracted, the front wheel 10 hits the front end of the outer panel 38 of the side sill, and the front end is easily crushed by the bead 42 as shown in FIG. 8, so that the front wheel 10 is guided by the inclined surface 34 to rotate. Accordingly, the front wheel 10 is retracted from a position serving as a tension member with respect to the side sill 22, and therefore, as in the case of the first embodiment, the rear region of the front wheel portion is smaller than in the case where the front wheel 10 is in a straight running state before rotation. Crash stroke lengthens.

Next, a third embodiment of the present invention will be described. 11 and 12 are bottom views of the third embodiment, and FIG.
12 shows the state before the collision, and FIG. 12 shows the state after the collision. In the third embodiment, the front wheel 10 is moved left by the suspension arm moving member.
It is configured to rotate to the right .

The suspension arm moving member in this embodiment is a suspension cross member 16 at the front of the vehicle body.
The suspension cross member 16 is configured to move the suspension arm 14 by moving an attachment point 14a on the vehicle body front among the vehicle body-side attachment points of the suspension lower arm 14.

That is, the suspension cross member 16 at the front of the vehicle body is formed in a chevron toward the front of the vehicle body, and beads 44 and 44 are respectively provided at the top of the chevron and at the bases (suspension arm attachment points ) of the two sides (displacement portions) of the chevron. configured as a suspension arm moving member by easily broken by forming a 46, at the time of collision from the front of the vehicle, as shown in FIG. 12, the displacement displacement portion of the vehicle front suspension cross member 16 of the member 16 The front part of the suspension arm is pushed rearward by the collapse of the front part and expands to the left and right, whereby the vehicle body side attachment point 14a located in front of the vehicle body of the suspension arm 14 moves outward in the vehicle width direction. 14 rotates, and the rear end of the front wheel 10 also rotates inward in the vehicle width direction.

When the rear end of the front wheel rotates inward in the vehicle width direction as described above, for example, a torque box 24 is located behind the rear end of the front wheel.
Also, the side sill 22 is a front wheel rear member, so that even if the front wheel 10 rotates, it is located in front of the front wheel rear member and still at the tension member position.

However, even in the rotation in such a direction, the rotation causes the front wheel rear member such as the side sill 22 or the torque box 24 to be displaced rearward as compared with the case where the vehicle is in the straight running state. The front wheel retreat distance before starting to deform becomes longer, and the crash stroke in the rear region can be made longer by that much.

The tie rod bent member and the inclined surface of the present invention
The suspension arm moving member is not limited to those shown in FIGS. 1 to 12, and other types of suspension arm moving members can be used. Further, the rear end of the wheel before the case of tie rods bent member and the inclined surface may be configured to rotate toward the inner side in the vehicle width direction, when its is exerted the same effect as the third embodiment, In the case of the suspension arm moving member, the rear end of the front wheel may be configured to rotate outward in the vehicle width direction. In that case, the same effects as those of the first and second embodiments can be obtained.

[0037]

According to the first aspect of the present invention , the front body structure of the automobile hits the tie rod of the front wheel due to the deformation of the front body , and the tie rod is bent.
Tairo' for rotating the front wheel to the left and right by causing the lower deformation
Since the front bending member is provided, the front wheel is rotated in the left or right direction by the tie rod bending member at the time of a collision from the front of the vehicle, whereby the front wheel is in The front wheel retreat distance before hitting the front wheel rear member and starting to displace and deform the member toward the rear as compared to the state before the front wheel rotates or retreats from the position where the front wheel rotates, for example, The crash stroke in the rear area of the front wheel portion can be increased without lengthening the rear area, so that the impact absorption at the time of collision is improved and the tie rod is
The abutment part of the front bend member is located forward with respect to the center axis of the front wheel.
It is located so that it is located behind the front wheel at the time of collision
The front wheel can be quickly turned in response to retreat,
The effect of increasing the stroke is reliably obtained.

According to the second aspect of the present invention, the front wheel rear member is a side sill, and the front end of the side sill is provided with a front wheel guide inclined surface , so that the above-mentioned effect can be realized without providing a separate member. In addition, the structure of the front body can be reduced.

Further, according to the third aspect of the present invention,
The displacement part of the suspension arm moving member is aligned with the center axis of the front wheel.
Is located in front of the
The front mounting position of the arm is in the vehicle width direction with respect to the rear mounting position.
By moving, so turning the front <br/> wheels each suspension arm, it is possible to obtain a rotation of the reliable pre wheel.

[Brief description of the drawings]

FIG. 1 is a bottom view showing a first embodiment.

FIG. 2 is a front view showing the first embodiment.

FIG. 3 is a side view showing the first embodiment.

FIG. 4 is a perspective view showing a first embodiment.

FIG. 5 is a bottom view showing a state before the collision according to the first mode of the second embodiment;

FIG. 6 is a bottom view of the first embodiment of the second embodiment after a collision.

FIG. 7 is a bottom view showing a state before a collision according to a second aspect of the second embodiment;

FIG. 8 is a bottom view showing a state after the collision in the second mode of the second embodiment;

FIG. 9 is an exploded perspective view showing an inclined surface according to a first embodiment of the second embodiment.

FIG. 10 is an exploded perspective view showing an inclined surface according to a second mode of the second embodiment.

FIG. 11 is a bottom view of the third embodiment before collision.

FIG. 12 is a bottom view showing the third embodiment after a collision.

[Explanation of symbols]

Reference Signs List 10 Front wheel 14 Suspension arm 14a Mounting point in front of vehicle body (front side mounting position) 16 Suspension cross member (suspension arm moving member) 20 Tie rod 22 Side sill (front wheel rear member) 26 Front body 30 Tie rod bending member 34 Inclined surface (front wheel rotation) means)

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A-2-212280 (JP, A) JP-A-63-263177 (JP, A) JP-A-58-105883 (JP, A) JP-A-63-263 227477 (JP, A) Japanese Utility Model Showa 62-105806 (JP, U) Japanese Utility Model Showa 63-142288 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 25/20

Claims (3)

(57) [Claims] 1. A front part of a vehicle in which a front body located forward of a vehicle compartment is crushed and deformed at the time of a collision of a vehicle, and a front wheel hits a front wheel rear member located behind the front wheel due to the crushed deformation of the front body. a vehicle body structure, than the front wheel of the tie rods definitive in the front body
The front body is also provided at the front part, and when the vehicle collides, the front body hits the tie rod of the front wheel due to the deformation of the front body.
Comprising a tie rod bent member for rotating the front wheel to the left and right by deforming bending Iroddo, the tie rod, the contact portion between the tie rod bent member
Position is located forward with respect to the center axis of the front wheel
A front body structure of an automobile, characterized in that it is made . 2. In the event of a collision of a vehicle, the vehicle is positioned in front of the vehicle body from the cabin.
The front body to be placed collapses and deforms,
Before the front wheel is located behind the front wheel due to the deformation of the front wheel
A front body structure of an automobile corresponding to a wheel rear member, wherein the front wheel rear member is a side sill, and the front body is attached to the front body at the time of a vehicle collision.
Front wheel rotation to rotate the front wheel to the left or right by crushing deformation
Moving means is provided, and the front wheel rotating means is formed at a front end of the side sill.
And the crushing deformation of the front body at the time of collision
The front wheel is rotated left and right by hitting the front wheel
And the front wheel is disposed on the front wheel with respect to the front wheel in a straight running state.
A front body structure of an automobile, which is opposed over substantially the entire width of the vehicle. 3. When the vehicle collides, the vehicle is positioned forward of the vehicle body relative to the cabin.
The front body to be placed collapses and deforms,
Before the front wheel is located behind the front wheel due to the deformation of the front wheel
A front body structure of a vehicle that corresponds to a rear wheel member, wherein the front wheel is disposed at two positions in front and rear with respect to a center axis of the front wheel.
Suspension pen attached to the front body to support the front wheel
Deployment arm and, grain of collision during the Furontobode I of the vehicle
The suspension arm
Of the two mounting positions on the front body
Move the side mounting position in the vehicle width direction with respect to the rear
This allows the front wheel to have a displacement
And a displacement part of the suspension arm moving member,
A front body structure of an automobile, wherein the front body structure is disposed so as to be located forward of a center axis of a wheel .