JP6115295B2 - Steering support member structure - Google Patents

Description

  The present invention relates to a structure of a steering support member that is mounted on a vehicle interior side and supports a steering shaft, an instrument panel, and the like.

Conventionally, a steering support member that supports a steering shaft, an instrument panel, and the like is installed on the vehicle interior side along the vehicle width direction, and the steering support members are provided at both left and right ends in the vehicle width direction. Is attached to the side of the vehicle body.
In such a structure of the steering support member, in order to secure the support rigidity of the steering support member, it is generally performed to connect the steering support member to the vehicle body in front of the vehicle (for example, Patent Document 1). 2). In this case, in order to increase the support rigidity of the tearing support member, it is preferable that the steering support member and the vehicle body in front of the vehicle are linearly connected.

JP 2010-105585 A JP 2000-108940 A

However, in the structure of the conventional steering support member described above, in the structure of Patent Document 1, the steering support member and the vehicle body in front of the vehicle are connected by a connecting member having a shape having a plurality of bent portions. Since the support member and the vehicle body are not linearly connected via the connecting member, there is a problem in that the support rigidity of the steering support member cannot be sufficiently increased.
Further, in the structure of Patent Document 2, the steering support member and the vehicle body in front of the vehicle are connected by a stay whose rear end is offset in the vehicle width direction with respect to the front end. There is a problem that the rigidity is low and vibration in the vehicle width direction cannot be sufficiently suppressed. In addition, when the stay is deformed so as to spread in the vehicle width direction due to the collision energy from the front of the vehicle, the deformed stay may come into contact with surrounding parts and the collision energy cannot be effectively absorbed. was there.

  On the other hand, when the steering support member and the vehicle body in front of the vehicle are linearly connected in the vehicle front-rear direction, energy from a collision from the front of the vehicle is directly transmitted to the steering support member as it is. Have the problem of Therefore, there is a demand for a structure that can effectively absorb collision energy while increasing the support rigidity of the steering support member.

  The present invention has been made in view of such a situation, and an object thereof is to improve the support rigidity of the steering support member by configuring the member connecting the vehicle body and the steering support member with two parts. An object of the present invention is to provide a structure of a steering support member that can efficiently and stably absorb energy due to an external load at the time of a collision.

In order to solve the above-described problems of the related art, the present invention provides a steering support member that is constructed along a vehicle width direction and is connected to a vehicle body on the vehicle front side via a connection member. Includes a first lean force extending linearly from the vehicle body in the vehicle front-rear direction and connected to the steering support member, and a second lean fixed to the first lean force force at a position in the vehicle front-rear direction. The first reinforcement is arranged so as to overlap with a force when viewed from above the vehicle, and is low in the vehicle width direction between the fixed points of the second reinforcement and the second reinforcement. a pair of weak portions before and after that is the rigidity, at intervals in the longitudinal direction of the vehicle, provided to have a width in the longitudinal direction of the vehicle, the second Rinfo A pair of front and rear weak parts having low rigidity in the vehicle width direction are spaced between the front and rear direction of the vehicle between the fixed points of the first reinforcement and the vehicle. Is provided with a width .

  Furthermore, in the present invention, the weakened portion provided in the first lean reinforcement is set to have a narrower width in the vehicle front-rear direction than the weakened portion provided in the second lean reinforcement.

  In the present invention, a high-rigidity rigid holding portion is provided in an intermediate portion of each fragile portion provided in the first lean reinforcement and the second lean reinforcement.

  In the present invention, the weakened portion provided in the first reinforcement is disposed at a central portion between the connecting portion to the vehicle body and the connecting portion to the steering support member.

  Further, in the present invention, the first lean reinforcement and the second lean reinforcement are each formed in a shape having flange portions standing on both the left and right sides of the flat plate, and by providing notches in the flange portions. The fragile part is formed.

As described above, the structure of the steering support member according to the present invention is a steering support member that is installed along the vehicle width direction and is connected to the vehicle body on the vehicle front side via the connecting member, and the connecting member includes: A first lean force extending linearly from the vehicle body in the vehicle front-rear direction and connected to the steering support member, and a second lean force fixed to the first lean force force at a position in the vehicle front-rear direction Are arranged so as to overlap with each other when viewed from above the vehicle. The first lean reinforcement has a low rigidity in the vehicle width direction between the fixed points of the second reinforcement and the second lean reinforcement. going on a pair of front and rear fragile part, at intervals in the longitudinal direction of the vehicle, provided to have a width in the longitudinal direction of the vehicle, the second Rinfu A pair of front and rear fragile portions having low rigidity in the vehicle width direction between the fixed points of the first reinforcement and the vehicle in the vehicle front-rear direction. because provided to have a width, through the first reinforcement extending linearly becomes possible to linearly support the steering support member from the vehicle body, enhancing the supporting rigidity of the steering support member Can do.
Moreover, since the connecting member is composed of a combination of two upper and lower parts, when receiving a collision load from the front of the vehicle, the deformation starts from the front end of the weak part of the first reinforcement and gradually becomes a weak part. Bending deformation also occurs between the two, the rear end of the fragile portion is finally deformed, and the first reinforcement is deformed into a Z shape when viewed from the side of the vehicle. In addition to being able to absorb, it is possible to suppress the impact of collision with the steering support member. In addition, when receiving a collision load from the front of the vehicle, the second lean force can also be deformed following the deformation of the first lean force, and the load absorbing performance is stably maintained. be able to.

  Furthermore, in the structure of the present invention, the weakened portion provided in the first reinforcement is set to have a narrower width in the vehicle front-rear direction than the weakened portion provided in the second reinforcement. When the vehicle receives a collision load from the front of the vehicle, the first lean force can easily cause the secondary deformation leading to the Z shape ahead of the second lean force, While preventing the lean reinforcement from deforming in an unintended direction, it is possible to prompt the first reinforcement to deform into a stable Z-shape.

  Further, in the structure of the present invention, since a rigid holding portion having high rigidity is provided in an intermediate portion of each fragile portion provided in the first lean force reinforcement and the second lean force force, the vehicle It is possible to clarify the break point that leads to the deformation of the Z shape when receiving a collision load from the front. In addition, it is possible to improve the rigidity of the connecting member in the normal state and to reliably deform the connecting member in the folding direction leading to the Z-shaped deformation.

  In the structure of the present invention, the fragile portion provided in the first reinforcement is disposed at a central portion between the connecting portion to the vehicle body and the connecting portion to the steering support member. When receiving a collision load from the front of the vehicle, the first lean reinforcement set in a straight line can be deformed from the central portion, and the transition to the Z-shaped deformation can be promoted. .

  In the structure of the present invention, the first lean reinforcement and the second lean reinforcement are each formed in a shape having flange portions standing on both the left and right sides of the flat plate, and notches are provided in these flange portions. Thus, since the fragile portion is formed, when receiving a collision load from the front of the vehicle, the first lean force is deformed before the second lean force, starting from the notch of the flange. Thus, the Z-shaped deformation can be assisted.

1 is a perspective view of a steering support member and a connecting member having a structure according to an embodiment of the present invention from the front of a vehicle. It is the perspective view which looked at the connection member which connects the steering support member of the structure which concerns on embodiment of this invention to the vehicle body ahead of a vehicle from diagonally upward. It is the top view which looked at the connection member in FIG. 1 from the vehicle upper direction. (A)-(c) is a side view which shows the deformation | transformation process of a connection member when the impact load from a vehicle front is received.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.
1 to 4 show the structure of a steering support member according to an embodiment of the present invention. Moreover, in FIGS. 1-4, the arrow Fr direction has shown the vehicle front.

  As shown in FIG. 1, a pipe-like steering support member 1 extending along the vehicle width direction is installed on the upper front side of the vehicle interior of the vehicle. The steering support member 1 is arranged in the vehicle width direction. Both left and right ends are attached to the side of the vehicle body via the end coupling bracket 2. Further, the steering support member 1 is arranged inside an instrument panel (not shown) of a large resin molded part on which various fittings are installed, and supports the instrument panel. A steering shaft and a steering wheel (not shown) are supported.

  In order to ensure rigidity for supporting these steering shafts and the like, the steering support member 1 of the present embodiment is structured to be attached to a vehicle body 3 such as a cowl upper panel positioned in front of the vehicle. Therefore, as shown in FIGS. 2 and 3, a connecting member 4 separate from the steering support member 1 is provided between the steering support member 1 and the vehicle body 3, and the steering support member 1 It is connected to the vehicle body 3 via a connecting member 4.

Further, as shown in FIGS. 2 and 3, the connecting member 4 of the present embodiment is arranged such that the upper side extends linearly in the vehicle front-rear direction in order to improve the support rigidity and vibration suppression performance of the steering support member 1. ing. In addition, the connecting member 4 is configured using a reinforcement of two upper and lower parts, and has a structure capable of improving the energy absorption performance and reliability of the collision load. That is, the connecting member 4 of the present embodiment includes a first lean force 5 that extends linearly from the vehicle body 3 in the vehicle front-rear direction and is connected to the steering support member 1, and a side of the first lean force 5. And a second reinforcement 6 fixed by welding and fixing at fixed points P1 and P2 at positions on the front and rear of the vehicle so as to overlap each other vertically when viewed from above the vehicle (top view). . For this reason, the second reinforcement 6 is formed in a shape that is shorter in the vehicle front-rear direction than the first reinforcement 5 that extends in a straight line and fits in the first reinforcement 5. Yes.
Note that the fixing points P1 and P2 of the second lean reinforcement 6 with the first lean force 5 are the same as those of the vehicle body 3 in order to obtain a Z-shaped deformation when receiving a collision load from the front of the vehicle. It is optimal to be provided in the vicinity of the connection portion between the first lean reinforcement 5 and in the vicinity of the connection portion between the steering support member 1 and the first reinforcement 5. The lower end of the second lean reinforcement 6 is welded to the upper portion of the support piece 5c extending from the rear end portion 5b of the first reinforcement 5 toward the front of the vehicle at a fixed point P3 at the center position. Has been fixed.

The first lean reinforcement 5 is linearly arranged along the vehicle front-rear direction on the upper surface side of the connecting member 4, and the front end portion 5 a of the downward inclined surface toward the vehicle front is fixed to the vehicle body 3 side. A wide rear end portion 5 b extending along the vehicle vertical direction is fixed to the steering support member 1. Further, in the first lean reinforcement 5, between the fixing points P1 and P2 with the second lean reinforcement 6, as shown in FIGS. 2 and 4, the rigidity is low in the vehicle width direction. Two weak parts A1 and A2 are provided with a width in the vehicle front-rear direction.
In addition, the fragile portions A1 and A2 provided in the first reinforcement 5 are disposed in the central portion between the connecting portion to the vehicle body 3 and the connecting portion to the steering support member 1 from the front of the vehicle. When the impact load is received, the first lean reinforcement 5 set in a straight line is deformed from the central portion.

On the other hand, in the second lean reinforcement 6, between the fixing points P1 and P2 with the first lean reinforcement 5, as shown in FIGS. 2 and 4, the rigidity is low in the vehicle width direction. Two weak parts B1 and B2 are provided with a width in the vehicle front-rear direction. Further, the weak portions A1 and A2 provided in the first lean force 5 are set to have a narrower width in the vehicle front-rear direction than the weak portions B1 and B2 provided in the second lean force 6. Moreover, the weak portions A1 and A2 of the first reinforcement 5 and the weak portions B1 and B2 of the second reinforcement 6 are set to have different pitches in the vehicle front-rear direction.
With the arrangement configuration of the upper and lower fragile portions A1, A2, B1, and B2, the second lean force 6 follows the deformation of the first lean force 5 when receiving a collision load from the front of the vehicle. In addition to causing deformation, the first lean force 5 is more likely to cause secondary deformation leading to the Z-shaped folding ahead of the second lean force 6, so that the first lean force 5 The Z-shape is urged to be stably deformed, so that the same deformation occurs for various forms.

  Further, a collision load from the front of the vehicle was received at the middle part in the vehicle front-rear direction of each fragile portion A1, A2, B1, B2 provided in the first lean force 5 and the second lean force 6. In order to clarify the breakage point leading to the deformation of the Z shape at the time, high-rigidity rigid holding portions C and D are respectively provided. By installing these highly rigid rigidity holding portions C and D, the rigidity of the connecting member in the normal state is improved, and the deformation in the folding direction leading to the deformation of the Z shape is surely performed. In addition, by setting the fragile portions A1, A2, B1, and B2 and the high-rigidity rigid holding portions C and D in a certain relationship, the same Z-shaped deformation can be achieved regardless of the type of the applied vehicle and the input load. Can be obtained.

As shown in FIG. 2 to FIG. 4, the first lean force 5 and the second lean force 6 in the present embodiment are flat plate main body portions 51, 61 and left and right sides of the main body portions 51, 61. Each of the flange portions 52 of the first lean force 5 extends downward, and the flange portion 62 of the second lean force 6 is formed in a U shape. It extends upward.
Further, a pair of front and rear cutouts 53 and 54 that are cut out in a U-shape are provided in the left and right flange portions 52 and 62 at intervals in the vehicle front-rear direction. The weak parts A1, A2, B1, and B2 are formed in the first lean force 5 and the second lean force 6, respectively. Therefore, when receiving a collision load from the front of the vehicle, the first lean force 5 is guided to be deformed before the second lean force 6 starting from the notch 53 of the flange portion 52. become.

  In a vehicle having the structure of the steering support member 1 connected to the vehicle body 3 via the connecting member 4 having such a configuration and arrangement, a collision load from the front of the vehicle is applied as shown by an arrow F in FIG. When it is received, deformation (buckling) is caused starting from the fragile portion A1 on the front side of the first reinforcement 5 linearly extending from the vehicle body 3 to the steering support member 1. In the process of the progress of the deformation, the load is transmitted to the second lean force 6 and the second lean force 6 is deformed so as to be slightly bent, and the first lean force 5 is deformed as shown in FIG. As shown in b), the vehicle moves toward the steering support member 1 at the rear of the vehicle.

Furthermore, when the deformation of the first lean force 5 and the second lean force 6 progresses, as shown in FIG. 4C, the load from the deformed point of the fragile portion A1 on the front side having a width is increased. The bending load starting from the fragile portion A2 on the rear side is received, and the fragile portions A1, A2 are further bent and deformed by this bending load, and the fragile portions B1, B2 of the second reinforcement 6 are also Causes bending deformation. Finally, the first lean force 5 and the second lean force 6 cause a Z-shaped deformation (secondary deformation) at a portion located between the fragile portions A1, A2, B1, and B2. It will be.
As the first lean force 5 and the second lean force 6 are deformed in this way, energy due to the collision load from the front of the vehicle is absorbed, and the load is transmitted to the steering support member 1. Is suppressed, and the movement of the steering support member 1 toward the rear of the vehicle is reduced.

  As described above, in the structure of the steering support member 1 according to the embodiment of the present invention, the connecting member 4 that connects the steering support member 1 to the vehicle body 3 on the vehicle front side extends linearly from the vehicle body 3 in the vehicle front-rear direction and is steered. A first lean force 5 connected to the support member 1; a second lean force 6 fixedly welded to the first lean force 5 at fixed points P1, P2 at positions in the front and rear of the vehicle; Are arranged on the top and bottom so as to overlap with each other when viewed from above the vehicle. In the first lean force 5, the flange portion 52 is provided between the fixed points P 1 and P 2 with the second lean force 6. Since the fragile portions A1 and A2 having low rigidity in the vehicle width direction by the notches 53 are provided with a width in the vehicle front-rear direction. Linearly can support the steering support member 1 from the vehicle body 3 through the first reinforcement 5 extending linearly, it is possible to obtain a high supporting rigidity of the steering support member 1.

In the structure of the present embodiment, the connecting member 4 is composed of a combination of upper and lower parts of the first and second reinforcements 5 and 6, so that when the collision load from the front of the vehicle is received, Deformation occurs starting from the front end of the fragile portion A1 of the lean reinforcement 5, and gradually bending deformation occurs between the fragile portions A1 and A2. Finally, the rear end of the fragile portion A2 is deformed and the first The lean reinforcement 5 is deformed into a Z shape when viewed from the side of the vehicle, so that the energy of the collision load can be efficiently absorbed and the influence of the collision on the steering support member 1 and the like can be suppressed.
Further, also in the second lean force 6, the notch 63 provided in the flange portion 62 provides a low rigidity in the vehicle width direction between the fixing points P 1 and P 2 with the first lean force 5. The weak portions B1 and B2 are provided with a width in the longitudinal direction of the vehicle, so that when the collision load from the front of the vehicle is received, the second lean force 6 also has the first lean force 5 The deformation following the deformation can be caused, and the load absorption performance can be maintained more stably.

  While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

  For example, in the above-described embodiment, the first lean force 5 and the second lean force 6 constituting the connecting member 4 stand up the flange portions 52 and 62 on the left and right sides of the flat plate main body portions 51 and 61. Although the first reinforcement 5 and the second reinforcement 6 are each formed using a pipe-shaped member, the second reinforcement 6 is not formed. The same effect can be obtained as long as the condition of having the characteristic portion of the present invention is satisfied, such as being within the first reinforcement 5.

In the above-described embodiment, the weak portions A1, A2, B1, and B2 of the first lean force 5 and the second lean force 6 are provided with notches 53 and 63 in the flange portions 52 and 62, respectively. However, the fragile portions A1, A2, B1, and B2 may be formed by providing notches 52 and 63 in the flat plate main body portions 51 and 61, or providing thin portions.
Furthermore, in the above-described embodiment, the first lean reinforcement 5 is connected to the vehicle body 3, but the connecting member 4 is linearly connected from the steering support member 1 via the first lean reinforcement 5. As long as it is connected to the vehicle body 3, the second reinforcement 6 may be connected to the vehicle body 3.

DESCRIPTION OF SYMBOLS 1 Steering support member 2 End part attachment bracket 3 Car body 4 Connection member 5 1st lean reinforcement 5a Front end part 5b Rear end part 6 2nd reinforcement 51,61 Main-body part (flat plate)
52, 62 Flange part 53, 63 Notch A1, A2 Fragile part B1, B2 Fragile part C, D High rigidity rigid holding part P1, P2 Fixing point

Claims (5)

In the structure of the steering support member that is constructed along the vehicle width direction and is connected to the vehicle body on the vehicle front side via a connecting member,
The connecting member extends linearly from the vehicle body in the vehicle front-rear direction and is connected to the steering support member, and is fixed to the first lean force force at a position in the vehicle front-rear direction. The two reinforcements are arranged so as to overlap in the vehicle upper view,
A pair of front and rear weak parts having low rigidity in the vehicle width direction are spaced apart in the vehicle front-rear direction between the fixed points of the first lean reinforcement and the second lean force. It is provided with a width in the longitudinal direction of the vehicle ,
A pair of front and rear weak parts having low rigidity in the vehicle width direction are spaced apart in the vehicle front-rear direction between the fixed points of the second lean reinforcement and the first lean force. A structure of a steering support member that is provided with a width in the front-rear direction of the vehicle . The fragile portion provided in the first reinforcement is set to have a narrower width in the vehicle front-rear direction than the fragile portion provided in the second reinforcement. The structure of the steering support member described in 1. Wherein the first reinforcement and the intermediate portion of each of the fragile portion provided in the second reinforcement, according to claim 1 or 2, characterized in that the rigid holding portion having high rigidity is al provided The structure of the steering support member described in 1. The first fragile portion provided in the reinforcement is claim, characterized in that arranged in the center portion between the connecting portion to said steering support member and the connecting portion to the vehicle body 1 The structure of the steering support member according to any one of? The first lean reinforcement and the second lean reinforcement are each formed in a shape having flange portions standing on the left and right sides of the flat plate, and the fragile portions are formed by providing notches in the flange portions. The structure of the steering support member according to claim 1, wherein the structure is a steering support member.

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