JP2015016738A - Vehicle door structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle door structure including an impact beam which inhibits damage caused by a load input from the outer side in a vehicle width direction and efficiently absorbs the load.SOLUTION: A vehicle door structure 10 includes: a door body part 12 which is formed into a closed cross section shape by a door outer panel 14 and a door inner panel 16; an impact beam 20 in which an intermediate part is bent in a door upper direction when viewed from a door thickness direction; and coupling members 24 which are respectively provided at both end parts 21 of the impact beam 20, attached to the door body part 12, and arrange the impact beam 20 at the door outer panel 14 side in a closed cross section surface of the door body part 12.

Description

  The present invention relates to a door structure for a vehicle.

  A door outer panel that forms the vehicle width direction (door thickness direction) outside of a vehicle door is molded from a resin material, and is used as a reinforcing beam that extends in the vehicle longitudinal direction (door longitudinal direction) on the inner surface side of the door outer panel. A door structure in which the horizontal ribs are integrally formed has been known (for example, see Patent Document 1).

JP-A-60-107415

  However, in this door structure, since the lateral rib as a reinforcing beam is formed of a resin material, the lateral rib is deformed inwardly in the vehicle width direction (door thickness direction) of the door outer panel due to a side collision of the vehicle. May break (crack). As described above, there is room for improvement in the door structure for efficiently absorbing the impact by suppressing the damage of the reinforcing beam (impact beam) at the time of a side collision of the vehicle.

  Therefore, an object of the present invention is to obtain a vehicle door structure including an impact beam that can suppress damage caused by a load input from the outside in the vehicle width direction and can efficiently absorb the load.

  In order to achieve the above object, a vehicle door structure according to claim 1 of the present invention includes a door main body configured in a closed cross-sectional shape with a door outer panel and a door inner panel, and a door thickness direction. As seen, an impact beam whose middle portion is curved upward or downward, and provided at both ends of the impact beam, is attached to the door body, and within the closed cross section of the door body. And a coupling member for disposing the impact beam on the door outer panel side.

  According to the first aspect of the present invention, the impact beam is bent in the door upward direction or the door downward direction as viewed from the door thickness direction, and is disposed on the outer panel side in the closed cross section of the door main body. Therefore, when a load is input to the door outer panel from the outside in the vehicle width direction (door thickness direction), the curved impact beam rotates toward the door inner panel and receives the load. Therefore, the damage of the impact beam due to the load input from the outside in the vehicle width direction is suppressed, and the load is efficiently absorbed by the impact beam.

  Further, the vehicle door structure according to claim 2 is the vehicle door structure according to claim 1, wherein the coupling member is made of metal, and the impact beam is made of resin. Both ends thereof are fixed to the coupling member, respectively.

  According to the invention described in claim 2, the coupling member is made of metal, and the impact beam is made of resin. Then, both end portions of the impact beam are fixed to the coupling member. Therefore, when a load is input to the door outer panel from the outside in the vehicle width direction (door thickness direction), the metal coupling member is torsionally deformed, so that the resin impact beam rotates toward the door inner panel.

  That is, the impact beam rotates toward the door inner panel while the coupling member applies a reaction force to the input load (the coupling member absorbs energy). Therefore, even if the impact beam is made of resin, breakage of the impact beam due to a load input from the outside in the vehicle width direction is suppressed, and the load is efficiently received by the impact beam.

  The vehicle door structure according to claim 3 is the vehicle door structure according to claim 1 or 2, wherein the coupling member elastically deforms the impact beam toward the door inner panel. It is characterized by having an elastic body to be rotated.

  According to the invention described in claim 3, the coupling member has the elastic body that rotates the impact beam toward the door inner panel side by elastic deformation. Therefore, when a load is input to the door outer panel from the outside in the vehicle width direction (door thickness direction), the resin-made impact beam is rotated toward the door inner panel side due to elastic deformation of the metal coupling member.

  That is, the impact beam rotates toward the door inner panel while applying a stable reaction force to the input load (while the coupling member stably absorbs energy). Therefore, even if the impact beam is made of resin, breakage of the impact beam due to the load input from the outside in the vehicle width direction is suppressed, and the load is received more efficiently by the impact beam.

  Further, the vehicle door structure according to claim 4 is the vehicle door structure according to claim 3, wherein the elastic body is in the same direction as a rotation direction of the impact beam toward the door inner panel. It is characterized by being a winding spring wound around.

  According to the invention described in claim 4, the elastic body is a winding spring wound in the same direction as the rotation direction of the impact beam toward the door inner panel. Therefore, the metallic coupling member is stably elastically deformed, and a stable reaction force can be applied to the load input from the outside in the vehicle width direction.

  As described above, according to the invention according to claim 1, it is possible to suppress the damage of the impact beam due to the load input from the outside in the vehicle width direction, and to efficiently absorb the load by the impact beam. Can do.

  According to the second aspect of the present invention, even if the impact beam is made of resin, it is possible to suppress the damage of the impact beam due to the load input from the outside in the vehicle width direction, and the load is efficiently used by the impact beam. I can take it well.

  According to the third aspect of the present invention, even if the impact beam is made of resin, it is possible to suppress the damage of the impact beam due to the load input from the outside in the vehicle width direction, and to further reduce the load by the impact beam. It can be received efficiently.

  According to the fourth aspect of the invention, the coupling member can apply a stable reaction force to the load input from the outside in the vehicle width direction.

It is the perspective view which omitted the door outer panel which shows the door structure for vehicles concerning this embodiment. It is a perspective view which expands and shows the cylindrical type coupling member which comprises the vehicle door structure which concerns on this embodiment. FIG. 3 is a cross-sectional view taken along line X-X in FIG. 2. It is a sectional side view which shows the behavior of an impact beam when the vehicle door structure which concerns on this embodiment carries out a side collision. (A) It is the perspective view which abbreviate | omitted the door outer panel which shows the impact beam after the side collision of the vehicle door structure which concerns on this embodiment. (B) It is a perspective view which expands and shows the twist deformation of the coupling member after the side collision of the vehicle door structure which concerns on this embodiment. It is a perspective view which expands and shows the columnar type coupling member which comprises the door structure for vehicles which concerns on this embodiment. It is a perspective view which expands and shows the square tube type coupling member which comprises the door structure for vehicles which concerns on this embodiment. It is a perspective view which expands and shows the winding spring type coupling member which comprises the door structure for vehicles which concerns on this embodiment.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. For convenience of explanation, an arrow UP appropriately shown in each drawing is an upward direction of the door, an arrow FR is a forward direction of the door, and an arrow OUT is an outer side of the door in the thickness direction. Moreover, in the following description, when the direction of up and down, front and back, inside and outside is described without special mention, it indicates the up and down direction of the door, the front and back direction of the door, the inside and outside of the door thickness direction.

  As shown in FIGS. 1 and 4, the vehicle door structure 10 according to the present embodiment includes a metal door outer panel 14 provided on the door thickness direction outer side, and a door thickness direction inner side, A resin (or metal) door inner panel 16 that forms a closed cross-sectional shape of the door main body 12 with the outer panel 14, and a metal formed in a frame shape on the upper portion of the door inner panel 16. A door frame 18 made of metal is provided.

  More specifically, the front lower end 18A of the door frame 18 is attached to the upper front end of the door inner panel 16 by means of joining means such as bolts, nuts, rivets, and adhesives, and the rear lower end 18B of the door frame 18 is attached. Is attached to the upper part of the rear end of the door inner panel 16 by a joining means such as a bolt / nut, a rivet, or an adhesive.

  An impact beam 20 made of fiber reinforced resin (made of FRP), for example, made of carbon fiber reinforced resin (made of CFRP), is disposed in the closed cross section of the door body 12. The impact beam 20 is formed in a cylindrical shape having a predetermined plate thickness and outer diameter so as to have a certain degree of rigidity (strength), and when viewed from the door thickness direction, a substantially central portion (intermediate portion of the door). Part) is formed in a curved shape curved in an arc shape (convex shape) in the upward direction of the door.

  Specifically, the impact beam 20 is curved in an arc shape upward between the door 21 and the opposite ends 21 (extending in the door front-rear direction) with the front-rear direction of the door as an axial direction. And a curved portion 22. In addition, although the impact beam 20 in this embodiment is made from resin, it is not limited to this and may be made from metal.

  At both ends 21 of the impact beam 20, metal coupling members 24 are provided. Each coupling member 24 has a cylindrical fitting portion 26 to which both ends 21 of the impact beam 20 are bonded and fixed, and a flat plate shape in which the door thickness direction is a normal direction. And a formed joint portion 28.

  As shown in FIGS. 2 and 3, one end side (the side facing each other) of the fitting portion 26 in each coupling member 24 is fitted into each end portion 21 of the impact beam 20 (in the radial direction). The outer peripheral surface on the one end side in the axial direction of the fitting portion 26 is firmly joined to the inner peripheral surface of the both end portions 21 of the impact beam 20 by the adhesive G. It has become. Thereby, both end portions 21 of the impact beam 20 are fixed to each coupling member 24.

  As shown in FIGS. 1 and 2, the joint portion 28 is integrally connected to the other end portion in the axial direction of the fitting portion 26, and protrudes toward the door outer panel 14 side of the door inner panel 16. The front end lower part 16A and the rear end lower part 16B are attached by joining means such as caulking, rivets and adhesives. Thereby, as shown in FIG. 4, the impact beam 20 is arranged on the door outer panel 14 side in the closed cross section of the door body 12.

  As shown in FIG. 2, the fitting portion 26 of the coupling member 24 is not entirely inserted into the end portion 21 of the impact beam 20, but the end portion 21 of the impact beam 20, the joint portion 28, and the like. A part of the space is exposed. A part of the exposed fitting portion 26 is twisted and deformed (rotation of the impact beam 20) as the impact beam 20 (curved portion 22) rotates toward the door inner panel 16 at the time of a side collision of the vehicle described later. Plastic deformation while applying a reaction force to the movement).

  Further, the maximum height of the curved portion 22 of the impact beam 20 (maximum height with reference to a rotation center axis K described later) is the length in the door thickness direction within the closed cross section of the door main body portion 12 (the door outer panel 14). Between the door inner panel 16 and the door inner panel 16 in the door thickness direction) or slightly smaller than that. Thus, the rotation of the impact beam 20 toward the door inner panel 16 is not hindered by the door inner panel 16.

  Further, as shown in FIG. 1, the fitting portion 26 of each coupling member 24 is not limited to a configuration in which the door front-rear direction (horizontal direction) is the axial direction when viewed from the door thickness direction. You may incline a little with respect to the door front-back direction. That is, each fitting part 26 should just be provided on the same rotation center axis | shaft K so that it may become a rotational axis of the curved part 22 of the impact beam 20. FIG.

  Further, the joining means for joining the both end portions 21 of the impact beam 20 and the fitting portion 26 of the coupling member 24 is not limited to the adhesive G (see FIG. 3), and a bolt, nut, rivet, etc., not shown. It may be. Further, when the door inner panel 16 is made of metal, the door frame 18 and the joint portion 28 may be joined by spot welding, arc welding, or the like.

  Next, the operation of the vehicle door structure 10 configured as described above will be described.

  As shown in FIG. 4, when the substantially central portion of the door body portion 12 in the front-rear direction of the door collides with the pole P, for example, the door outer panel 14 moves in the vehicle width direction (door thickness) due to the collision load input thereby. Direction) Deforms inward. Then, the pole P relatively presses the curved portion 22 of the impact beam 20 toward the inner side in the vehicle width direction (door thickness direction) via the deformed door outer panel 14.

  Here, both end portions 21 of the impact beam 20 are respectively fixed to one end side in the axial direction of the fitting portion 26 in the coupling member 24. Therefore, when the bending portion 22 of the impact beam 20 is relatively pressed toward the inner side in the vehicle width direction (door thickness direction) due to the collision load input from the outer side in the vehicle width direction (door thickness direction), FIG. As shown in FIG. 5, the fitting portion 26 of the coupling member 24 is twisted and deformed.

  That is, the fitting portion 26 of the coupling member 24 is plastically deformed while applying a reaction force (resistance force) to the rotation of the impact beam 20 (while absorbing energy). Therefore, the curved portion 22 of the impact beam 20 can efficiently receive (absorb energy) the collision load while rotating to the door inner panel 16 side. Thereby, the deformation | transformation to the vehicle width direction (door thickness direction) inner side of the door inner panel 16 can be suppressed or prevented.

  In addition, the curved portion 22 of the impact beam 20 rotates toward the door inner panel 16 while the input collision load is efficiently absorbed by the torsional deformation of the fitting portion 26, so that the curved portion 22 receives (energy). The impact load can be reduced. Therefore, even if the impact beam 20 is made of CFRP that does not extend, deformation or breakage of the curved portion 22 can be suppressed or prevented.

  Moreover, in the vehicle door structure 10 according to the present embodiment, as described above, the impact beam 20 arranged in the closed cross section of the door main body 12 is made of a resin material (fiber reinforced resin material). Therefore, compared with the case where the impact beam 20 is made of a metal material, there is an advantage that the door body 12 itself can be reduced in weight.

  In addition, the fitting part 26 of the coupling member 24 is not limited to the structure inserted in the both ends 21 of the impact beam 20, and the both ends 21 of the impact beam 20 are inserted in the fitting part 26 (diameter). It may be configured to be inserted with a small gap in the direction). That is, the outer peripheral surface of the both end portions 21 of the impact beam 20 may be fixed to the inner peripheral surface of the fitting portion 26 with the adhesive G or the like.

  Furthermore, the fitting portion 26 of the coupling member 24 is not limited to one formed in a cylindrical shape. For example, as FIG. 6 shows, you may be set as the fitting part 26 formed in the column shape (solid shape). However, in this case, only the configuration in which the fitting portion 26 is fitted into the both end portions 21 of the impact beam 20 is provided.

  Further, at least the both end portions 21 of the impact beam 20 and the fitting portion 26 of the coupling member 24 may be formed in a rectangular tube shape (as shown in the figure, a rectangular tube shape) as shown in FIG. 7, for example. In this case, the fitting portion 26 may be configured to be inserted into both end portions 21 of the impact beam 20, or the both end portions 21 of the impact beam 20 may be configured to be inserted into the fitting portion 26. Also good.

  Furthermore, the fitting portion 26 of the coupling member 24 may be configured by a winding spring 30 as an example of an elastic body as shown in FIG. 8, for example. The winding spring 30 constituting the fitting portion 26 is wound in the same direction as the rotation direction of the impact beam 20 (curved portion 22) toward the door inner panel 16 from the center side toward the peripheral side. When a collision load is input from the outside in the vehicle width direction (door thickness direction), the impact beam 20 is stably rotated toward the door inner panel 16 due to its elastic deformation.

  Therefore, in the case of the fitting portion 26 configured by the winding spring 30, a reaction force (resistance force) against the rotation of the impact beam 20 can be stably applied, and the bending portion 22 of the impact beam 20 The collision load can be received efficiently (energy absorption). In addition, in the case of the fitting part 26 comprised by this winding spring 30, it becomes only the structure inserted by the both ends 21 of the impact beam 20. FIG.

  The vehicle door structure 10 according to the present embodiment has been described with reference to the drawings. However, the vehicle door structure 10 according to the present embodiment is not limited to the illustrated one, and the gist of the present invention is described. The design can be changed as appropriate without departing from the scope. For example, the elastic body is not limited to the winding spring 30 shown in FIG. 8, but can provide a stable reaction force (resistance force) against the rotation of the impact beam 20. That's fine.

  Further, the impact beam 20 may be formed in a curved shape in which a substantially central portion (intermediate portion) in the front-rear direction of the door curves in a circular arc shape (convex shape) downward in the door as viewed from the door thickness direction. In this case, each joint part 28 is attached to the front end upper part and the rear end upper part which protruded to the door outer panel 14 side of the door inner panel 16 by the joining means described above. In this case, the winding direction of the winding spring 30 is opposite to the winding direction shown in FIG.

DESCRIPTION OF SYMBOLS 10 Vehicle door structure 12 Door main-body part 14 Door outer panel 16 Door inner panel 20 Impact beam 21 End part 24 Connection member 30 Winding spring (elastic body)

Claims (4)

A door main body configured in a closed cross-sectional shape with a door outer panel and a door inner panel;
An impact beam whose middle part is curved in the upward direction or downward direction of the door as viewed from the door thickness direction;
A coupling member that is provided at both ends of the impact beam, is attached to the door main body, and disposes the impact beam on the door outer panel side in a closed cross section of the door main body,
A vehicle door structure. The coupling member is made of metal,
The vehicle door structure according to claim 1, wherein the impact beam is made of resin, and both end portions thereof are respectively fixed to the coupling member.   3. The vehicle door structure according to claim 1, wherein the coupling member includes an elastic body that rotates the impact beam toward the door inner panel by elastic deformation. 4.   The vehicle door structure according to claim 3, wherein the elastic body is a winding spring wound in the same direction as a rotation direction of the impact beam toward the door inner panel.

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