JP6743331B2 - Impact beam mounting structure for vehicle doors - Google Patents

Description

The present invention relates to an impact beam mounting structure for a vehicle door.

As shown in Patent Document 1, an impact beam is provided on a side door of a vehicle in order to maintain the strength of the door during a side collision. The impact beam is a strength member that extends in the front-rear direction of the vehicle in the space between the door outer panel and the door inner panel.The impact beam is located close to the door outer panel, and the front and rear ends are located near the front and rear ends of the door inner panel. It is attached by spot welding. The impact beam may also be configured such that the vertical position of its rear end portion corresponds to the vertical position of the door lock, as shown in Patent Document 1.

By associating the vertical position of the rear end of the impact beam with the vertical position of the door lock as described above, the impact load acting on the impact beam during a side collision can be effectively received by the vehicle body through the door lock. It is advantageous in terms of strength against the load during a side collision.

On the other hand, however, the impact of the side door closing motion is effectively received by the vehicle body through the door lock. Since the impact load is repeatedly applied to the portion, the joint strength of the spot welded portion between the impact beam and the door inner panel may be reduced early.

Japanese Patent Laid-Open No. 08-192629

The present invention has been devised under the above circumstances, and provides an impact beam mounting structure for a vehicle door capable of preventing or suppressing a decrease in strength of a spot welded portion due to repeated closing movements of the vehicle door. That is the subject.

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

That is, a vehicle door impact beam mounting structure provided by the present invention is a vehicle door including a door outer panel, a door inner panel, an impact beam, and a door lock. In the structure in which the door inner panel is joined to the door lock in a vertical position corresponding to the door lock, the impact beam extends in the longitudinal direction and a bead having a vertical width reduction portion formed at a rear end thereof, and the impact. A welding flange spot-welded to the door inner panel at the rear end of the beam, and an auxiliary flange connected to the vertical width reduction portion of the bead and the welding flange, the auxiliary flange penetrating in the thickness direction thereof. It is characterized in that holes are formed.

According to the impact beam mounting structure for a vehicle door having the above-described configuration, the impact beam has a bead extending in the longitudinal direction, and the rear end of the impact beam is joined to the door inner panel in a vertical position corresponding to the door lock. Therefore, the impact load acting on the impact beam at the time of a side collision is effectively received by the vehicle body through the door lock, so that the advantage in strength against the load at the side collision is maintained.

Further, at the rear end of the impact beam, since the welding flange and the auxiliary flange connected to the vertical width reduction portion of the bead have holes penetrating in the thickness direction thereof, the rear end of the impact beam, that is, , The bending rigidity of a limited area near the spot welded portion to the door inner panel is appropriately reduced. As a result, it is possible to mitigate the impact acting on the spot welded portion to the door inner panel via the impact beam when the vehicle door is closed, and as a result, the impact beam and the door inner due to the repeated opening and closing of the vehicle door. It is possible to suppress an early decrease in the joint strength of the spot welded portion with the panel.

Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the drawings.

1 is a side view of a vehicle to which the present invention is applied. It is an expanded sectional view which follows the II-II line of FIG. FIG. 3 is a view taken along the line III-III in FIG. 2. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is sectional drawing which follows the VV line of FIG.

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

1 to 5 show a vehicle door impact beam attachment structure A according to an embodiment of the present invention. This door impact beam mounting structure is one in which the present invention is applied to the side door 10 on the rear side of the vehicle.

The side door 10 is located so as to close the door opening of the vehicle body, has an upper window portion 11 and a lower hem portion 12, and can be opened and closed by a hinge 15 provided on a center pillar 14 of the vehicle body. ..

The side door 10 includes a door outer panel 110, a door inner panel 120, a door lock 130, and an impact beam 200.

The door outer panel 110 is made of sheet metal, forms the external appearance design surface of the side door 10 of the vehicle, and has a side outer shape corresponding to the door opening of the vehicle body 13. The door inner panel 120 is made of sheet metal, and forms the outer shell of the side door inside the door outer panel 110 in cooperation with the door outer panel 110.

In the horizontal cross-section of the hem 12 of the side door 10 (FIG. 2 ), the door inner panel 120 includes a peripheral flange portion 121 joined to the peripheral portion of the door outer panel 110 by a hemming portion 124, and the peripheral flange portion 121. An upright portion 122 that bends and extends toward the vehicle compartment side via the step-down portion 121a, and a vehicle room side bulging portion 123 located on the vehicle interior side with a predetermined distance from the door outer panel 110 via the upright portion 122, Have.

The door lock 130 is fixed to the inner surface of the upright portion 122 of the door inner panel 120 at the rear portion of the side door 10, and cooperates with the striker 16 attached to the vehicle body side to form a lock mechanism 130a. A latch (not shown) of the door lock 130 is engaged with the striker 16 to maintain the closed state of the side door 10, and the lock mechanism 130 a is released by the vehicle exterior door handle provided on the outer surface of the side door 10 or the side door 10. The vehicle interior side door handle (not shown) provided on the inner surface of the vehicle is operated to rotate the release lever 131 of the door lock 130 through a mechanical cooperation mechanism such as a link rod (not shown). Done.

The impact beam 200 is a strength member that is disposed inside the door outer panel 110 so as to extend in the front-rear direction of the vehicle, receives a shock load acting on the side door 10 in a side collision, and protects an occupant in the room. It is a member made of sheet metal having a relatively thick thickness of about 1 mm.

The impact beam 200 has a longitudinal shape in the vehicle front-rear direction, and has flanges 210 at upper and lower edges, and a bead 220 that bulges outward in the vehicle width direction and extends in the front-rear direction at upper and lower intermediate portions. In this embodiment, the beads 220 are formed in upper and lower two rows. As a result, the bending rigidity of the impact beam 200 is enhanced. The bead 220 has a vertical width reduction portion 221 at the rear end of the impact beam 200, the vertical width of which decreases toward the rear, and the vertical width reduction portion 221 of the bead 20 is provided at the rear end of the impact beam 200. A welding flange 230 is formed that extends in the vertical direction from the tip of the and is joined to the door inner panel 120. Further, the impact beam 200 has an auxiliary flange 240 that is continuous from the welding flange 230 forward and is connected to the vertical width reduction portion 221 of the bead 220 and the flange 210. The auxiliary flange 240 has a hole 241 formed therethrough in the thickness direction.

The vertical position of the impact beam 200 is set corresponding to the vertical position of the door lock 130. Further, in the embodiment, the vertical position of the impact beam 200 is set so that the hole 241 formed in the auxiliary flange 240 is located outward of the vehicle width direction corresponding to the position of the release lever 131 of the door lock 130. ing. The impact beam 200 is thus set in the vertical position, and the welding flange 230 is spot-welded (spot-welded portion 250) to the door inner panel 120. The portion of the door inner panel 120 to which the welding flange 230 is spot-welded is a portion where the rigidity is strengthened because it is in the vicinity of the rising portion 122 of the step drop portion 121a.

Next, the operation of the vehicle door impact beam mounting structure A having the above configuration will be described.

The impact beam 200 has a bead 220 extending in the longitudinal direction, and since the rear end of the impact beam 200 is joined to the door inner panel 120 at a vertical position corresponding to the door lock 130, the impact beam 200 is attached to the impact beam 200 during a side collision. The impact load that acts is effectively received by the vehicle body 10 via the door lock 130, so that the advantage of the strength of the side door 10 against the load during a side collision is maintained.

Further, at the rear end of the impact beam 200, a hole 241 penetrating in the thickness direction is formed in the auxiliary flange 240, so that at the rear end of the impact beam 200, that is, at the spot welded portion 250 to the door inner panel 120. The bending stiffness of the near confined area is moderately reduced. Accordingly, when the side door 10 is closed, the impact acting on the spot welded portion 250 on the door inner panel 120 via the impact beam 200 can be mitigated, and as a result, the impact beam generated by repeating the opening and closing of the side door 10 is performed. It is possible to suppress the early decrease in the joint strength of the spot welded portion 250 between the door 200 and the door inner panel 120.

Further, since the hole 241 formed in the auxiliary flange 240 of the impact beam 200 is positioned corresponding to the release lever 131 of the door lock 130, the lock mechanism 130a is unintentionally released by the impact at the time of a side collision, It may be possible to prevent the side door 10 from opening.

That is, at the time of a side collision, the barrier pushes the impact beam 200 together with the door outer panel 110 inward (in the vehicle width direction) in the vehicle width direction, and thereby the impact beam 200 moves inward in the vehicle width direction, whereby the release lever of the door lock 130 is released. It is conceivable that the lock mechanism 130a may be unlocked by rotating the 131 to the unlocking side, but even in such an emergency, the hole 241 formed in the auxiliary flange 240 causes the door inner panel 120 and the door lock 130 to open. It can be expected that the interference with the release lever 131 can be avoided and the release lever 131 can be prevented from accidentally rotating to the release side.

Of course, the scope of the present invention is not limited to the above-described embodiments, and all design changes within the scope of the matters described in the claims are included in the scope of the present invention.

In the embodiment, the present invention is applied to the rear side door, but it goes without saying that the present invention can also be applied to the front side door.

Also, in the embodiment, the hole 241 formed in the auxiliary flange 240 of the impact beam 200 is provided on the upper side of the vertical width reduction portion 221 of the bead 220, but it may be provided on the lower side or both upper and lower sides.

Further, the shape and size of the hole 241 formed in the auxiliary flange 240 of the impact beam 200 can be appropriately selected.

A Impact Beam Mounting Structure 10 Side Door 11 Window Part 12 Bottom Part 13 Car Body 14 Center Pillar 15 Hinge 16 Striker 110 Door Outer Panel 120 Door Inner Panel 121 Peripheral Flange Part 121a Step Drop Part 122 Standing Part 123 Vehicle Room Side Swelling Part 124 Hemming Part 130 Door lock 130a Lock mechanism 131 Release lever 200 Impact beam 210 Flange 220 Bead 221 Vertical width reduction part 230 Welding flange 240 Auxiliary flange 241 Hole 250 Spot welding

Claims (1)

After the impact beam in a vehicle door including a door outer panel, a door inner panel, an impact beam, and a door lock fixed to the door inner panel and unlocked through rotation of a release lever. In the structure in which the end portion is joined to the door inner panel in a vertical position corresponding to the door lock,
The impact beam is a bead that extends in the longitudinal direction and has a vertical width reduction portion formed at the rear end, a welding flange that is spot-welded to the door inner panel at the rear end of the impact beam, and the top and bottom of the bead. Including a width reduction portion and an auxiliary flange connected to the welding flange,
The aforementioned auxiliary flange at a position facing the release lever, characterized in that it is formed a hole penetrating in Thickness Direction, impact beam mounting structure of the vehicle door.

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