JP4816010B2 - Vehicle door structure - Google Patents

Description

  The present invention relates to a vehicle door structure, and more particularly to a vehicle door structure that requires door closing performance.

As a conventional vehicle door structure, there is the following (for example, refer to Patent Document 1). For example, Patent Document 1 discloses an example of a door panel and a manufacturing method thereof. In the example described in Patent Document 1, the door outer panel and the door inner panel provided in the door are made of a light alloy such as an aluminum alloy or a magnesium alloy, so that the weight of the door is reduced.
Japanese Patent No. 3351947

  However, in the example described in Patent Document 1, the door outer panel and the door inner panel provided in the door are made of a light alloy such as an aluminum alloy or a magnesium alloy in order to reduce the weight of the door. For this reason, the moment of inertia of the whole door using the door hinge as a fulcrum is reduced, and the door closing property is low due to this.

  This invention is made | formed in view of the said situation, The objective is to provide the door structure for vehicles which can improve door closing property.

In order to solve the above-described problem, the vehicle door structure according to claim 1 is configured to have a door glass frame portion and a door frame rear portion on the door lock device side, and the center of gravity. A door frame that is closer to the rear of the vehicle than the center of gravity of the entire door, and a door body that is provided on the lower side of the door frame and includes a door panel, an impact beam, and a reinforcing member. The door frame rear portion is made of a material having a specific gravity greater than that of the door frame portion, the door panel, the impact beam, and the reinforcing member except for the door frame rear portion of the door frame.

Here, the door frame, for example, has a shape that spreads from the front to the rear of the vehicle in a side view of the vehicle due to improved vehicle aerodynamic characteristics, and its center of gravity is closer to the rear of the vehicle than the center of gravity of the entire door. Therefore, as in the vehicle door structure according to claim 1 , the door frame rear portion is made of a material having a specific gravity greater than that of the door frame portion, door panel, impact beam, and reinforcing member excluding the door frame rear portion. If the door frame part except the door frame rear part, the door panel, the impact beam, and the reinforcing member become lighter, the center of gravity of the door frame is located behind the center of gravity of the entire door (door lock device side). As a result, the door closing performance is improved.

In order to solve the above problem, the vehicle door structure according to claim 2 is configured to have a frame portion of the door glass and a door frame front portion on the door hinge side, and the center of gravity thereof. A door frame that is closer to the rear of the vehicle than the center of gravity of the entire door, and a door body that is provided on the lower side of the door frame and includes a door panel, an impact beam, and a reinforcing member. Of the door frame, the door frame portion excluding the door frame front portion is made of a material having a specific gravity greater than that of the door frame front portion, the door panel, the impact beam, and the reinforcing member.

Here, the door frame, for example, has a shape that spreads from the front to the rear of the vehicle in a side view of the vehicle due to improved vehicle aerodynamic characteristics, and its center of gravity is closer to the rear of the vehicle than the center of gravity of the entire door. Therefore, as in the vehicle door structure according to claim 2 , the door frame portion excluding the door frame front portion is made of a material having a specific gravity greater than that of the door frame front portion, the door panel, the impact beam, and the reinforcing member. The door frame front part, door panel, impact beam, and reinforcing member become lighter, but the door frame part excluding the door frame front part where the center of gravity is located on the vehicle rear side (door lock device side) rather than the center of gravity of the entire door As a result, the door closing performance is improved.

In order to solve the above-mentioned problem, the vehicle door structure according to claim 3 constitutes a frame portion of the door glass and has at least one of a door mirror bracket and a door lower frame front portion on the door hinge side. A door frame configured to include a door panel, an impact beam, and a reinforcing member provided at a lower side of the door frame, and the door mirror bracket and the door lower frame front portion. The center of gravity of the door frame portion excluding at least one is positioned closer to the door lock device than the door hinge of the door frame, and the door frame excluding at least one of the door mirror bracket and the door lower frame front portion of the door frame. The door mirror bracket and the door lower Frame front portion of at least one and the door panel, the impact beam, characterized in that it consists of a large material of specific gravity than the material of the reinforcing member.

Here, in the vehicle door structure according to claim 3 , the center of gravity of the door frame part excluding at least one of the door mirror bracket and the door lower frame front part has a rear side of the door frame, that is, the door lock device side from the door hinge. Located in. Therefore, as in the vehicle door structure according to claim 3 , the door frame portion excluding at least one of the door mirror bracket and the door lower frame front portion includes at least one of the door mirror bracket and the door lower frame front portion, the door panel, the impact beam, If it is made of a material with a specific gravity greater than that of the reinforcing member, at least one of the door mirror bracket and the door lower frame front part and the door panel, impact beam, and reinforcing member will be lighter, but on the door lock device side than the door hinge Since the door frame part excluding at least one of the door mirror bracket and the door lower frame front part where the center of gravity is located becomes heavy, the door closing property is improved as a result.

In order to solve the above problem, a vehicle door structure according to claim 4 is provided on a lower side of the door frame that constitutes a frame portion of a door glass, a door panel, an impact beam, A door body having a reinforcing member, and the door panel, the impact beam, and the reinforcing member are made of a material having a specific gravity smaller than that of the door frame, and the door frame is on the door lock device side. A door lower frame rear portion, and a center of gravity of the door lower frame rear portion is positioned closer to the door lock device than a door hinge of the door frame, and the door lower frame rear portion of the door frame The door frame part excluding the door panel, the impact beam, and the reinforcing member are made of the material of the door lower frame rear part. Characterized in that it consists of a small material of remote gravity.

Here, in the vehicle door structure according to the fourth aspect , the center of gravity of the door lower frame rear portion is located on the rear side of the door frame, that is, on the door lock device side of the door hinge. Therefore, as in the vehicle door structure according to claim 4 , the door frame portion excluding the door lower frame rear portion, the door panel, the impact beam, and the reinforcing member of the door frame are more specific than the material of the door lower frame rear portion. If the door frame is made of a small material, the door frame, door panel, impact beam, and reinforcing member excluding the door lower frame rear part of the door frame become lighter, while the center of gravity is located on the door lock device side of the door body. Since the door lower frame rear part becomes heavy, the door closing performance is improved as a result.

Moreover, in order to solve the said subject, the vehicle door structure of Claim 5 is provided in the door frame which comprises the frame part of a door glass, the said door frame, and a door panel, an impact beam, A door body configured to include a reinforcing member, and a door outer reinforcement upper and a door outer reinforcement lower provided on the door body, wherein the door panel, the impact beam, and the reinforcing member are provided on the door frame. The door outer reinforcement upper and the door outer reinforcement lower are made of a material having a specific gravity smaller than the material, and the center of gravity of the door outer reinforcement lower is located at the center of the front and rear width of the door, and is located behind the center of gravity of the entire door. The impact beam, the reinforcing member, and the door frame are connected to the door. Characterized in that it consists of a small material of specific gravity than at least one of the material of the Songs over reinforcement upper and the door outer reinforcement lower.

Here, the center of gravity of the entire door is centered on the width of the front and rear of the door, for example, by setting the front door of the speaker for the purpose of increasing the mass due to increased rigidity on the door hinge side and the acoustic effect from the front of the occupant, or setting the door mirror bracket. Rather than the front of the vehicle. On the other hand, the center of gravity of the door outer reinforcement upper and the door outer reinforcement lower is located at the center of the door front-rear width and is located behind the center of gravity of the entire door. Therefore, as in the vehicle door structure according to claim 5 , the door panel, the impact beam, the reinforcing member, and the door frame have a smaller specific gravity than at least one of the door outer reinforcement upper and the door outer reinforcement lower. The door panel, impact beam, reinforcement member, and door frame are lighter, while at least one of the door outer reinforcement upper and the door outer reinforcement lower having a center of gravity behind the center of gravity of the entire door is provided. As a result, the center of gravity of the entire door moves rearward and the door closing performance is improved.

  As described above in detail, according to the present invention, the center of gravity of the entire door moves toward the door lock device, so that the door closing performance can be improved.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted that members, arrangements, and the like described below do not limit the present invention, and it goes without saying that various modifications can be made in accordance with the spirit of the present invention.

[ First Reference Example ]
First , a vehicle door structure 10 according to a first reference example will be described with reference to FIGS. 1 to 7.

As shown in FIG. 1, the vehicle door structure 10 according to the first reference example is suitably used for a vehicle 12 such as a passenger car, for example. As shown in FIG. 2, the front and rear doors 14 of the vehicle 12 of the present embodiment are provided with a door main body 16, and the door main body 16 includes a door outer panel 18 and a door inner panel 20. Is provided. The center of gravity of the door outer panel 18 is disposed at a position substantially equal to the center of gravity of the entire door 14, and the center of gravity of the door inner panel 20 is increased in mass due to increased rigidity on the side of the door hinge 38 serving as an opening / closing support shaft of the door 14. From the center of gravity of the entire door 14 to the door hinge 38 side.

  An impact beam 22 extends between the door outer panel 18 and the door inner panel 20 (inside the door) along the vehicle front-rear direction. The belt line of the door outer panel 18 is provided with a belt line outer reinforcement 24 as a reinforcing member along the longitudinal direction of the vehicle. The waist line of the door outer panel 18 has a door outer as a reinforcing member. Reinforcement 26 is provided along the vehicle longitudinal direction.

  On the other hand, a belt line inner reinforcement 28 as a reinforcing member is provided on the belt line of the door inner panel 20 along the vehicle front-rear direction. The gravity center of the impact beam 22, the beltline outer reinforcement 24, the door outer reinforcement 26, and the beltline inner reinforcement 28 is arranged at a position substantially equal to the gravity center of the entire door 14.

  A door frame 30 constituting a frame portion of the door glass 36 is provided on the upper side of the door body 16. The door frame 30 is provided on a door frame front part 30A provided on the vehicle front side (door hinge 38 side), a door frame upper part 30B provided on the upper side, and a vehicle rear side (door lock device 40 side). Door frame rear portion 30C.

The door frame 30 has a shape that spreads from the front to the rear of the vehicle in a side view of the vehicle due to improved vehicle aerodynamic characteristics, and its center of gravity is closer to the rear of the vehicle than the center of gravity of the entire door 14. Further, the door frame 30 has an outer shape when viewed from the front of the vehicle. The upper part of the door frame 30 is located on the center side of the vehicle in terms of securing the occupant's living space, centering the center of gravity of the vehicle, measures against crosswinds, and design. The lower portion of the door frame 30 is located on the outer side in the vehicle width direction with respect to the center line of the tire 42 in terms of the positional relationship with the guard and the aerodynamic characteristics.

  Further, as shown in FIG. 7, protrusions 32 and 34 are provided on the upper side of the belt line of the door frame 30 toward the vehicle body frame 31 side such as side members (roof side rails) and pillars. A plurality are provided along the forming direction. Note that the protrusions 32 and 34 may be provided one by one, or may be provided continuously along the direction in which the door frame 30 is formed. Further, as shown in FIG. 7A, the door frame 30 may be formed separately, or as shown in FIG. 7B, it may be formed integrally. Further, it may be formed on at least one of the upper side and the lower side of the door frame 30.

  In this embodiment, the door outer panel 18, the door inner panel 20, the impact beam 22, the belt line outer reinforcement 24, the door outer reinforcement 26, and the belt line inner reinforcement 28 (hereinafter referred to as door panels P1) are provided. It is made of a material having a specific gravity smaller than that of the door frame 30.

  Here, the magnitude relationship of the specific gravity of each material in this case is as follows. That is, for example, iron is used as a material having a large specific gravity, and aluminum, magnesium, and resin are used in descending order of specific gravity as a material having a specific gravity smaller than that of iron. Further, as a material having a small specific gravity with respect to a combination of iron and aluminum, a combination of iron and magnesium, a combination of iron and resin, a combination of aluminum and magnesium, a combination of aluminum and resin, a combination of magnesium and resin, or the like may be used. good. The specific gravity may be increased or decreased by a combination of these materials or a combination of other materials.

  Next, the operation of the vehicle door structure 10 having the above configuration will be described.

  In the front and rear doors 14 of the present embodiment, the outer shape of the door frame 30 when viewed from the front of the vehicle is, for example, that the upper part of the door frame 30 is related to securing the occupant's living space, centering the vehicle center of gravity, measures against crosswinds, and design. The lower portion of the door frame 30 is located outside the center line of the tire 42 in the vehicle width direction in view of the positional relationship with the wheel guard and the aerodynamic characteristics.

  Accordingly, if the door panel P1 is made of a material having a specific gravity smaller than that of the door frame 30 as in the present embodiment, the door panel P1 whose center of gravity is located on the outer side in the vehicle width direction becomes lighter, while the vehicle The door frame 30 whose center of gravity is located on the inner side in the width direction becomes heavy. As a result, as shown in FIG. 1A, the center of gravity G2 of the entire door 14 approaches the center of gravity G1 of the entire vehicle 12 rather than on the center of the tire 42. As a result, the roll direction (R1 direction) and yaw of the vehicle 12 are increased. The moment of inertia in the direction (R2 direction) can be reduced.

Further, in the front and rear doors 14 of the present embodiment, the door frame 30 is, for example, a shape that spreads from the front to the rear of the vehicle in a side view of the vehicle from the improvement of the vehicle aerodynamic characteristics, and the center of gravity is the entire door 14. It is closer to the rear of the vehicle than the center of gravity. Further, the center of gravity of the door outer panel 18 is disposed at a position substantially equal to the center of gravity of the entire door 14, and the center of gravity of the door inner panel 20 is derived from an increase in mass due to increased rigidity on the side of the door hinge 38 serving as a door opening / closing support shaft. It is arranged closer to the door hinge 38 than the center of gravity of the entire door 14. Thereby, the center of gravity of the door panel P1 is closer to the door hinge 38 than the center of gravity of the entire door 14.

  Therefore, if the door panels P1 are made of a material having a specific gravity smaller than the material of the door frame 30 as in the present embodiment, the door panels P1 whose center of gravity is positioned on the front side of the vehicle with respect to the center of gravity of the door 14 as a whole. On the other hand, the door frame 30 whose center of gravity is located on the vehicle rear side (door lock device 40 side) is heavier than the center of gravity of the door 14 as a whole. As a result, as shown in FIG. 3, the center of gravity G2 of the entire door 14 moves rearward, so that the door closing property of the door 14 is improved.

  Further, according to the present embodiment, since the door panels P1 whose center of gravity is located on the vehicle front side with respect to the center of gravity of the entire door 14 are lighter, the center of gravity G1 of the vehicle 12 is rearward (driving) as shown in FIG. The person's hip point P, the center side of the front and rear tires 42). Thereby, the burden of the front tire 42 can be reduced. In addition, the sense of unity between the driver and the vehicle can be improved, and the linearity can also be improved. Furthermore, the moment of inertia in the yaw direction (R2 direction) can also be reduced. Most of the existing vehicles have an engine mounted on the front tire 42 side. However, according to the above-described configuration of the present embodiment, the midship layout (in order to improve steering stability by F1 technology or the like) The engine can be placed close to the driver's back.

  Further, as shown in FIG. 2B, other door panels P1 are lighter at the lower part of the door 14 (door body 16) than the door frame 30 passing through the center of the door 14 in the vehicle width direction. Due to the configuration of the door 14, the mass ratio of the door 14 increases around the door lock device 40, which is often set at the center of the door 14 in the vehicle width direction. As a result, the moment of inertia of each part around the door lock device 40 is reduced, and even when the door 14 receives vibration in the vertical direction, the rotational vibration of the door 14 centering on the door lock device 40 can be suppressed. it can. As a result, abnormal noise caused by vibration of the door 14 and air pressure fluctuation in the room can be reduced, and durability of the rubber parts such as the door 14, the door lock device 40, the door hinge 38, and the glass run can be improved. .

  The vibration of the vehicle 12 is transmitted to the lower part of the door 14 (door body 16) via the door hinge 38 and the door lock device 40, and the vibration of the lower part of the door 14 is transmitted to the occupant's eardrum via the door frame 30. However, according to the configuration of the present embodiment, the door panel P1 far from the passenger's ear becomes lighter than the door frame 30 near the passenger's ear, so that the eardrum vibration accompanying the vehicle vibration can be reduced.

  That is, as shown in FIG. 5, when the weight of the lower portion of the door 14 (door body 16) is reduced in weight relative to the door frame 30, the lower portion of the door 14 tends to vibrate. Even if the door frame 30 vibrates, the door frame 30 hardly vibrates, and as a result, the vibration of the eardrum can be reduced. Further, the vibration of the lower part of the door 14 is far from the eardrum and the vibration of the eardrum can be suppressed by the door trim 66 or the like, while the eardrum vibration from the door frame 30 is difficult to reduce because the visibility of the door glass 36 is secured. According to the above configuration of the present embodiment, the eardrum vibration accompanying the vehicle vibration can be reduced.

  Further, the door outside handle 44 is disposed as close to the door glass 36 as possible under the door glass 36 in order to ensure the operability for the passenger. Further, the center of gravity of the door 14 as a whole is more concentrated on the lower part of the door 14 (the door body 16) than the door outside handle 44 because the door panel P1 and most of the window regulator, speaker, door trim 66, etc. (not shown) are concentrated. On the bottom. As a result, the center of gravity of the entire door 14 approaches the door outside handle 44 by reducing the weight of the door lower side than the door frame 30 as in the present embodiment. Thereby, when the passenger's door is closed, energy loss due to the door 14 being twisted can be reduced, so that the door closing property is improved (see FIG. 2).

  Further, according to the present embodiment, as shown in FIG. 6B, the center of gravity G2 of the door 14 as a whole approaches the door lock device 40, and therefore the door 14 is rotated by the lateral G when the vehicle 12 is cornered. It can be reduced, unnecessary moment of inertia can be reduced, and occupant linearity can be improved. Further, when the center of gravity G2 of the entire door 14 approaches the door lock device 40 side that fixes the door 14 to the vehicle body, the moment of inertia of the door 14 around the door lock device 40 decreases. Thereby, the rotational movement of the door unit by the lateral G can be reduced. In addition, since the center of gravity G2 of the entire door 14 approaches the door lock device 40, the mating property of the striker member and the latch member of the door 14 is also improved. In this case, the impact beam 22 may be formed by press molding as shown in FIG.

  Further, according to the present embodiment, as shown in FIG. 7, one or more protrusions 32 and 34 or the door frame 30 is formed on the vehicle frame 31 side above the belt line of the door frame 30. It is provided continuously along the direction. Therefore, the weight of the entire door frame 30 is increased by the protrusions 32 and 34. Thereby, door closing property further improves. Further, the center of gravity G2 of the entire door 14 becomes closer to the center of gravity G1 of the entire vehicle, and as a result, the moment of inertia of the vehicle 12 in the roll direction (R1 direction) and the yaw direction (R2 direction) can be further reduced. Further, by providing the projections 32 and 34, the projections 32 and 34 are caught by the vehicle body skeleton 31 at the time of a side collision, whereby the load from the door 14 can be transmitted to the body skeleton, the roof rail, the body pillar, and the like.

  In this embodiment, since it is considered that the influence on the moment of inertia in the door closing property, the roll direction (R1 direction) and the yaw direction (R2 direction) of the vehicle 12 is small, the door main body 16 includes a joining rivet. The specific gravity and weight of bolts, adhesives and damping sheets are not considered. The same applies to each embodiment described below.

[ Second Reference Example ]
Next, a vehicle door structure 70 according to a second reference example will be described with reference to FIGS. 8 to 14.

The vehicle door structure 70 according to the second reference example has the same configuration as that of the vehicle door structure 10 according to the first reference example , and the size relationship of the materials of the members is changed. Therefore, in the vehicle door structure 70 according to the second reference example , the same reference numerals are used for members having the same configuration as the first reference example, and the description thereof is omitted.

In the front and rear doors 14 of the vehicle door structure 70 according to the second reference example , the door outer panel 18, the door inner panel 20, the belt line outer reinforcement 24, the door outer reinforcement 26, the belt line inner reinforcement 28, The door frame 30 (hereinafter referred to as a door panel P2) is made of a material having a specific gravity smaller than that of the impact beam 22.

In this case, the magnitude relationship of the specific gravity of each material is as described in the first reference example .

  Next, the operation of the vehicle door structure 70 having the above configuration will be described.

  As shown in FIGS. 8 and 9, the impact beam 22 is disposed, for example, in the vicinity of the height of the vehicle bumper from the side in order to suppress the amount of cabin deformation at the time of a side collision. The center of gravity of the beam 22 is below the center of gravity of the entire door 14. On the other hand, since the specific gravity of the door panel P2 is small, the center of gravity G2 of the entire door 14 is lowered in the vehicle vertical direction as shown in FIG. 8B. Thereby, since the center of gravity G1 of the vehicle 12 is lowered, the steering stability is improved. Further, since the center of gravity G2 of the entire door 14 approaches the height of the impact beam 22 (the bumper height of the vehicle from the side), the body generation load at the time of a side collision can also be increased.

  The center of gravity of the door 14 as a whole is determined by, for example, the front-rear width of the door by setting the front door of the speaker for the purpose of increasing the mass due to increased rigidity on the door hinge 38 side and the acoustic effect from the front of the occupant, or by setting the door mirror bracket 54. The vehicle is ahead of the center. On the other hand, the center of gravity of the impact beam 22 extending to the front and rear ends of the door is located at the center of the front and rear width of the door and is behind the center of gravity of the entire door 14. As a result, the door panel P2 is light and the impact beam 22 having the center of gravity behind the center of gravity of the entire door 14 becomes heavier, so the center of gravity G2 of the entire door 14 moves rearward as shown in FIG. The door closing performance is improved.

  In addition, the impact beam 22 is disposed, for example, on the outer side in the vehicle width direction of the door 14 in order to suppress the amount of cabin deformation at the time of a side collision. As a result, the center of gravity of the impact beam 22 is greater than the center of gravity of the door 14 as a whole. Is also located outside. In the present embodiment, since the specific gravity of the material of the door panel P2 with respect to the impact beam 22 is reduced, as shown in FIG. 11, the weight balance B1 in which the center of gravity of the entire door 14 is lowered is initially set. The weight balance B of the vehicle body is corrected so as to approach the weight balance B2. Thereby, the weight balance B of the vehicle 12 is ensured, and an increase in the moment of inertia of the vehicle 12 in the roll direction (R1 direction) and the yaw direction (R2 direction) can be suppressed. This is because the wind regulator and the speaker are attached to the door inner panel 20, so that the center of gravity of the impact beam 22 is more than the center of gravity of the entire door 14 in consideration of the layout since the center of gravity of the entire door 14 is likely to be inside the vehicle. It is located outside.

  Next, a modification of this embodiment will be described.

  In the above-described embodiment, the impact beam 22 is disposed between the door outer panel 18 and the door inner panel 20, but the impact beam 22 is disposed on the outer side in the vehicle width direction of the door outer panel 18 as shown in FIG. May be arranged. In this case, the impact beam 22 may be decorated with a decorative material 46 such as a door molding, tape, or paint.

  As described above, when the impact beam 22 is disposed outside the door outer panel 18 in the vehicle width direction and is decorated with the decoration material 46, the weight of the entire impact beam 22 including the decoration material 46 increases. Thereby, door closing property further improves. In addition, the center of gravity of the vehicle is further lowered, and steering stability is further improved. Further, by ensuring the weight balance B of the vehicle 12, an increase in the moment of inertia of the vehicle 12 in the roll direction (R1 direction) and the yaw direction (R2 direction) can be further suppressed. Furthermore, the impact beam 22 and the decorative material 46 can prevent the door outer panel 18 from being damaged.

  Further, at least one of the front side and the rear side of the impact beam 22 in the vehicle front-rear direction, as shown in FIG. 13, the connection edge 48 (door outer side) of the door outer panel 18 and the door inner panel 20 in the vehicle side view. Hemming) may be overlapped. That is, at least one of the front side and the rear side of the impact beam 22 in the vehicle front-rear direction may be extended in the door outer hemming direction so as to cross the vertical wall 50 extending in the vehicle width direction at the end of the door inner panel 20. .

  With such a configuration, the mass increases due to the extension of the impact beam 22, and thus the door closing performance and the steering stability are further improved. In addition, the amount of the impact beam 22 that overlaps (wraps) the body pillar in a vehicle side view is increased because at least one of the front side in the vehicle front-rear direction and the vehicle rear side increases. Transmission efficiency can be improved (body generating load increases).

  Further, in this case, as shown in FIG. 14, a bracket 52 as a load transmission member is provided toward the inside in the vehicle width direction on at least one of the front side and the rear side of the impact beam 22 in the vehicle front-rear direction. May be. If it does in this way, due to the mass increase of the impact beam 22, door closing property and steering stability will further improve. Further, the bracket 52 further improves the load transmission efficiency from the impact beam 22 to the body pillar 68 at the time of a side collision. That is, the load transmission from the impact beam 22 to the body pillar 68 at the time of a side collision is accelerated, and the strength of the body skeleton can be used effectively. Moreover, since the bracket 52 is caught by the body pillar 68 at the time of a side collision, the proof stress of the impact beam 22 can be used effectively.

  Furthermore, in this case, if the layout is such that the rear end of the impact beam 22 of the front door and the front end of the impact beam 22 of the rear door are close to each other, a bracket 52 provided at the rear end of the impact beam 22 of the front door 14; The bracket 52 provided at the front end of the impact beam 22 of the rear door 14 interferes with each other at the time of a side collision (see a two-dot chain line). For this reason, the bending fulcrum of the impact beam 22 approaches the fixed end side, and as a result, the body generation load increases.

[ First embodiment ]
Next, the vehicle door structure 80 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

The vehicle door structure 80 according to the first embodiment of the present invention has the same configuration as that of the vehicle door structure 10 according to the first reference example , and the magnitude relationship of the materials of the members is changed. . Therefore, in the vehicle door structure 80 according to the first embodiment of the present invention, the same reference numerals are used for members having the same configurations as those in the first reference example, and the description thereof is omitted.

In the front and rear doors 14 of the vehicle door structure 80 according to the first embodiment of the present invention, the door frame rear portion 30C is a door frame portion excluding the door frame rear portion 30C (that is, the door frame front portion 30A and the door frame). From the material of the upper portion 30B) and the door outer panel 18, door inner panel 20, impact beam 22, belt line outer reinforcement 24, door outer reinforcement 26, belt line inner reinforcement 28 (hereinafter referred to as door panel P3). Is also made of a material with a large specific gravity.

In this case, the magnitude relationship of the specific gravity of each material is as described in the first reference example .

  Next, the operation of the vehicle door structure 80 having the above configuration will be described.

  In the front and rear doors 14 of the present embodiment, the outer shape of the door frame 30 in the front view of the vehicle is, for example, as described above, ensuring the occupant's living space, centralizing the center of gravity of the vehicle, measures against crosswind, and the design. The upper portion of the door frame 30 is located on the vehicle center side, and the lower portion of the door frame 30 is located on the outer side in the vehicle width direction with respect to the center line of the tire 42 in view of the positional relationship with the wheel guard and aerodynamic characteristics. Yes.

  Therefore, if the door frame rear portion 30C is made of a material having a specific gravity greater than that of the door panel P3 as in the present embodiment, the door panel P3 whose center of gravity is located on the outer side in the vehicle width direction becomes lighter. The door frame 30 whose center of gravity is located on the inner side in the vehicle width direction becomes heavy. As a result, as shown in FIG. 1A, the center of gravity G2 of the entire door 14 approaches the center of gravity of the entire vehicle rather than on the center of the tire 42. As a result, the roll direction (R1 direction) and yaw direction ( R2 direction) moment of inertia can be reduced.

Further, in the front and rear doors 14 of the present embodiment, the door frame 30 is, for example, a shape that spreads from the front to the rear of the vehicle in a side view of the vehicle from the improvement of the vehicle aerodynamic characteristics, and the center of gravity is the entire door 14. Is closer to the rear of the vehicle than the center of gravity G2. Further, the center of gravity of the door outer panel 18 is disposed at a position substantially equal to the center of gravity of the entire door 14, and the center of gravity of the door inner panel 20 is derived from an increase in mass due to increased rigidity on the side of the door hinge 38 serving as a door opening / closing support shaft. It is arranged closer to the door hinge 38 than the center of gravity of the entire door 14. As a result, the center of gravity of the door panel P3 is closer to the door hinge 38 than the center of gravity of the door 14 as a whole.

  Therefore, if the door frame rear portion 30C is made of a material having a specific gravity greater than that of the door panel P3 as in the present embodiment, the door panels whose center of gravity is located on the vehicle front side of the center of gravity of the door 14 as a whole. While P3 becomes lighter, the door frame rear portion 30C whose center of gravity is located on the vehicle rear side (door lock device 40 side) is heavier than the center of gravity of the entire door 14. As a result, as shown in FIG. 3, the center of gravity G2 of the entire door 14 moves rearward, so that the door closing property of the door 14 is improved.

  In particular, the parting of the front door 14 of four doors is, for example, because the lower end of the center pillar is the front of the vehicle in order to ensure ease of getting on and off the rear seat, the lower side of the door frame rear portion 30C is the front of the vehicle, and the door frame rear portion 30C. As a result, in the front door 14, the specific gravity of the material of the door frame rear portion 30C arranged rearmost is larger than the material of the other door panels P3. The door closing property can be improved.

Moreover, according to the said structure of this embodiment, the gravity center G2 of the door 14 whole moves to a vehicle back compared with the structure of a 1st reference example . Thereby, as compared with the configuration of the first reference example , the moment of inertia in the roll direction (R1 direction) and the yaw direction (R2 direction) of the vehicle 12 can be further reduced, and the door closing property of the door 14 is further improved.

  In addition, according to the present embodiment, the door frame rear portion 30C is heavy and the other door panels P3 are light, so that the weight of the door 14 can be reduced while suppressing a decrease in the moment of inertia in the door closing property. In addition, fuel efficiency can be improved by reducing the weight of the door 14.

  Further, according to the present embodiment, the door panel P3 having the center of gravity positioned on the front side of the vehicle is lighter than the center of gravity of the entire door 14, and therefore, as shown in FIG. The person's hip point P, the center side of the front and rear tires 42). Thereby, the burden of the front tire 42 can be reduced. In addition, the sense of unity between the driver and the vehicle can be improved, and the linearity can also be improved. Furthermore, the moment of inertia in the yaw direction (R2 direction) can also be reduced. Most of the existing vehicles have an engine mounted on the front tire 42 side. However, according to the above-described configuration of the present embodiment, the midship layout (in order to improve steering stability by F1 technology or the like) The engine can be placed close to the driver's back.

Further, according to the above-described configuration of the present embodiment, the center of gravity G2 of the entire door 14 moves to the rear of the vehicle (the driver's hip point P, the center side of the front and rear tires 42) as compared to the configuration of the first reference example. As a result, the above-described operational effect due to the movement of the center of gravity G1 of the vehicle 12 to the rear of the vehicle is increased compared to the configuration of the first reference example .

Further, as shown in FIG. 2B, other door panels except for the door frame 30 than the door frame 30 passing through the center of the door 14 in the vehicle width direction at the lower part of the door 14 (door body 16). Since P3 becomes light, the mass ratio of the door 14 increases around the door lock device 40 that is often set at the center of the door 14 in the vehicle width direction due to the configuration of the door 14. As a result, the moment of inertia of each part around the door lock device 40 is reduced, and even when the door 14 receives vibration in the vertical direction, the rotational vibration of the door 14 centering on the door lock device 40 can be suppressed. it can. As a result, abnormal noise caused by vibration of the door 14 and air pressure fluctuation in the room can be reduced, and durability of the rubber parts such as the door 14, the door lock device 40, the door hinge 38, and the glass run can be improved. . In this case, the center of gravity G2 of the entire door 14 is lowered downward with respect to the configuration of the first reference example , but the center of gravity G2 of the entire door 14 approaches the door lock device 40 in the vehicle front-rear direction. The same performance as the first reference example can be expected.

  Further, the vibration of the vehicle is transmitted to the lower part of the door 14 (door body 16) via the door hinge 38 and the door lock device 40, and the vibration of the lower part of the door 14 is transmitted to the occupant's eardrum via the door frame 30. According to the above configuration of the present embodiment, the door panel P3 excluding the door frame 30 far from the passenger's ear becomes lighter than the door frame 30 near the passenger's ear, so that the eardrum vibration accompanying the vehicle vibration is reduced. Can do.

That is, as shown in FIG. 5, when the weight of the lower portion of the door 14 (door body 16) is reduced in weight relative to the door frame 30, the lower portion of the door 14 tends to vibrate. Even if the door frame 30 vibrates, the door frame 30 hardly vibrates, and as a result, the vibration of the eardrum can be reduced. Further, the vibration of the lower part of the door 14 is far from the eardrum and the vibration of the eardrum can be suppressed by the door trim 66 or the like, while the eardrum vibration from the door frame 30 is difficult to reduce because the visibility of the door glass 36 is secured. According to the above configuration of the present embodiment, it is possible to reduce the eardrum vibrations caused by the vehicle vibration can be expected configuration equivalent to the performance of the first reference example.

Further, the door outside handle 44 is disposed as close to the door glass 36 as possible under the door glass 36 in order to ensure the operability for the passenger. Further, the center of gravity of the entire door 14 is lower than the door outside handle 44 because most of the door panel P3, the window regulator, the speaker, the door trim 66 and the like are concentrated on the lower part of the door 14 (the door body 16). It becomes. As a result, the center of gravity of the entire door 14 approaches the door outside handle 44 by reducing the weight of the door lower side than the door frame 30 as in the present embodiment. Thereby, when the passenger's door is closed, energy loss due to the door 14 being twisted can be reduced, so that the door closing property is improved (see FIG. 2). In this case, the center of gravity G2 of the door 14 as a whole lowers with respect to the configuration of the first reference example , but the center of gravity G2 of the door 14 as a whole approaches the door outside handle 44 in the longitudinal direction of the vehicle. The same performance as the first reference example can be expected.

Further, according to the present embodiment, as shown in FIG. 6B, the center of gravity G2 of the door 14 as a whole approaches the door lock device 40, and therefore the door 14 is rotated by the lateral G when the vehicle 12 is cornered. It can be reduced, unnecessary moment of inertia can be reduced, and occupant linearity can be improved. Further, when the center of gravity G2 of the door 14 as a whole approaches the door lock device 40 side that fixes the door 14 to the vehicle body, the moment of inertia of the door around the door lock device 40 decreases. Thereby, the rotational movement of the door unit by the lateral G can be reduced. In addition, since the center of gravity G2 of the entire door 14 approaches the door lock device 40, the mating property of the striker member and the latch member of the door 14 is also improved. In this case, the center of gravity G2 of the entire door 14 is lowered downward with respect to the configuration of the first reference example , but the center of gravity G2 of the entire door 14 approaches the door lock device 40 in the vehicle front-rear direction. The same performance as the first reference example can be expected.

[ Second Embodiment ]
Next, a vehicle door structure 90 according to a second embodiment of the present invention will be described with reference to FIG.

The vehicle door structure 90 according to the second embodiment of the present invention has the same configuration as that of the vehicle door structure 10 according to the first reference example , and the magnitude relationship of the materials of the members is changed. . Therefore, in the vehicle door structure 90 according to the second embodiment of the present invention, the same reference numerals are used for members having the same configuration as the first reference example, and the description thereof is omitted.

In the front and rear doors 14 of the vehicle door structure 90 according to the second embodiment of the present invention, the door frame portions (that is, the door frame upper portion 30B and the door frame rear portion 30C) excluding the door frame front portion 30A are doors. From the material of the frame front portion 30A, the door outer panel 18, the door inner panel 20, the impact beam 22, the belt line outer reinforcement 24, the door outer reinforcement 26, and the belt line inner reinforcement 28 (hereinafter referred to as door panels P4). Is also made of a material with a large specific gravity.

In this case, the magnitude relationship of the specific gravity of each material is as described in the first reference example .

  Next, the operation of the vehicle door structure 90 configured as described above will be described.

According to the front and rear doors 14 of the present embodiment, as in the first reference example , the door panels P4 having the center of gravity positioned on the outer side in the vehicle width direction are lightened, while the center of gravity is positioned on the inner side in the vehicle width direction. The door frame 30 becomes heavy. As a result, the center of gravity of the entire door 14 comes closer to the center of gravity of the entire vehicle 12 than on the center of the tire 42. As a result, the moment of inertia of the vehicle 12 in the roll direction (R1 direction) and the yaw direction (R2 direction) can be reduced (see FIG. 1 (a)).

Further, the door panel P4 whose center of gravity is located on the vehicle front side of the entire center of the door 14 becomes lighter, while the door frame whose center of gravity is positioned on the vehicle rear side (door lock device 40 side) of the center of the door 14 as a whole. The rear part 30C becomes heavy. Thereby, the door closing property of the door 14 improves as a result. In addition, the same operational effects as the first reference example are obtained.

In addition, according to the present embodiment, the door frame part excluding the door frame front part 30A is made of a material having a specific gravity greater than that of the door panel P4, so that the door 14 is compared with the structure of the first reference example. The movement of the entire center of gravity to the rear of the vehicle is large. For this reason, the effect by the gravity center of the vehicle 12 moving to the vehicle back increases further compared with the structure of the said 1st reference example . Moreover, the door closing property is further improved.

[ Third embodiment ]
Next, a vehicle door structure 100 according to a third embodiment of the present invention will be described with reference to FIG.

The vehicle door structure 100 according to the third embodiment of the present invention has the same configuration as that of the vehicle door structure 10 according to the first reference example , and the magnitude relationship of the materials of the members is changed. . Therefore, in the vehicle door structure 100 according to the third embodiment of the present invention, the same reference numerals are used for members having the same configurations as those in the first reference example, and the description thereof is omitted. In the vehicle door structure 100 according to the third embodiment of the present invention, the door mirror bracket 54 and the door lower frame front portion 56 are provided on the vehicle front side of the door frame 30 provided in the front door 14. A door lower frame front portion 56 is provided on the vehicle front side of the door frame 30 provided on the rear door 14.

In the front and rear doors 14 of the vehicle door structure 100 according to the third embodiment of the present invention, the door frame portion excluding the door mirror bracket 54 and the door lower frame front portion 56 includes the door outer panel 18 and the door inner panel. 20, a material having a higher specific gravity than the material of impact beam 22, beltline outer reinforcement 24, door outer reinforcement 26, beltline inner reinforcement 28 (refer to FIG. 2 above) (hereinafter referred to as door panel P5). It is configured.

In this case, the magnitude relationship of the specific gravity of each material is as described in the first reference example .

  Next, the operation of the vehicle door structure 100 having the above configuration will be described.

According to the configuration of the present embodiment, the center of gravity G2 of the door 14 as a whole is closer to the center of gravity G1 of the vehicle 12 as compared with the configuration of the first reference example , so that the roll direction (R1 direction) of the vehicle 12 and the yaw The moment of inertia in the direction (R2 direction) can be further reduced.

Further, according to the present embodiment, the door frame part excluding the door mirror bracket 54 and the door lower frame front part 56 is made of a material having a specific gravity larger than that of the door panel P5, so that the structure of the first reference example is achieved. On the other hand, the movement of the center of gravity G2 of the entire door 14 to the rear of the vehicle is large. For this reason, the effect by the center-of-gravity G1 of the vehicle 12 moving back is further increased as compared with the configuration of the first reference example . Further, the center of gravity G2 of the entire door 14 moves rearward of the vehicle, so that the door closing property is further improved as compared with the configuration of the first reference example . In particular, when the center of gravity G1 of the vehicle 12 moves rearward, the effect of reducing the moment of inertia in the yaw direction (R2 direction) is increased as compared with the configuration of the first reference example .

  Next, a modification of this embodiment will be described.

  In the above embodiment, the door frame portion excluding the door mirror bracket 54 and the door lower frame front portion 56 is made of a material having a specific gravity larger than that of the door panel P5, but at least one of the door mirror bracket 54 and the door lower frame front portion 56 is used. The door frame part except for may be made of a material having a specific gravity greater than that of at least one of the door mirror bracket 54 and the door lower frame front part 56 and the door panel P5. Even if it does in this way, there can exist the said effect.

[ Third reference example ]
Next, a vehicle door structure 110 according to a third reference example will be described with reference to FIG.

The vehicle door structure 110 according to the third reference example has the same configuration as that of the vehicle door structure 10 according to the first reference example , and the size relationship of the material of each member is changed. Therefore, in the vehicle door structure 110 according to the third reference example , the same reference numerals are used for members having the same configuration as the first reference example, and the description thereof is omitted. In the vehicle door structure 110 according to the third reference example , a hinge side panel 39 is provided on each door hinge 38 side of the front and rear door bodies 16.

In the front and rear doors 14 of the vehicle door structure 110 according to the third reference example , the hinge side panel 39 includes the door outer panel 18, the door inner panel 20, the impact beam 22, the beltline outer reinforcement 24, the door. The outer reinforcement 26 and the beltline inner reinforcement 28 (refer to FIG. 2 above) (hereinafter referred to as door panels P6) are made of a material having a smaller specific gravity.

In this case, the magnitude relationship of the specific gravity of each material is as described in the first reference example .

  Next, the operation of the vehicle door structure 110 configured as described above will be described.

According to the above-described configuration of the present embodiment, the plate is thicker (heavy) than the door inner panel 20 (see FIG. 2) because it is positioned on the outer side in the vehicle width direction than the door frame 30 and the rigidity of the periphery of the door hinge 38 is ensured. By reducing the weight of the hinge side panel 39, the center of gravity G2 of the entire door 14 moves toward the center of gravity G1 of the vehicle 12 in the vehicle width direction. As a result, as in the first reference example , the moment of inertia of the vehicle 12 in the roll direction (R1 direction) and the yaw direction (R2 direction) can be reduced.

  Further, the center of gravity of the hinge side panel 39 is located on the door hinge 38 side of the door body 16, and the center of gravity of the door panel P 6 is located on the door lock device 40 side of the door hinge 38 of the door body 16. Therefore, if the hinge side panel 39 is made of a material having a specific gravity smaller than that of the door panel P6 as in the present embodiment, the hinge side panel 39 positioned on the door hinge 38 side becomes lighter, while the door body Since the door panels P6 whose center of gravity is located closer to the door lock device 40 than the 16 door hinges 38 are heavier, the door closing performance is improved as a result.

According to the present embodiment, the hinge side panel 39 is made of a material having a specific gravity smaller than that of the door panel P6, so that the center of gravity G1 of the vehicle 12 is rearward of the vehicle relative to the configuration of the first reference example. Go further. For this reason, the effect by the center-of-gravity G1 of the vehicle 12 moving back is further increased as compared with the configuration of the first reference example .

Further, similarly to the second reference example , the center of gravity G2 of the entire door 14 can be lowered and moved to the outside. As a result, as in the second reference example , the steering stability is further improved by further lowering the center of gravity G1 of the vehicle 12, and the roll direction (R1 direction) and yaw of the vehicle 12 are secured by ensuring the weight balance of the vehicle 12. An increase in the moment of inertia in the direction (R2 direction) can be suppressed.

[ Fourth Reference Example ]
Next, a vehicle door structure 120 according to a fourth reference example will be described with reference to FIG.

The vehicle door structure 120 according to the fourth reference example has the same configuration as that of the vehicle door structure 10 according to the first reference example , and the size relationship of the material of each member is changed. Therefore, in the vehicle door structure 120 according to the fourth reference example , the same reference numerals are used for members having the same configuration as in the first reference example, and the description thereof is omitted. In the vehicle door structure 120 according to the fourth reference example , the door lock reinforcement 58 is provided on the door lock device 40 side of the front and rear door bodies 16.

In the front and rear doors 14 of the vehicle door structure 120 according to the fourth reference example , the door outer panel 18, the door inner panel 20, the impact beam 22, the belt line outer reinforcement 24, the door outer reinforcement 26, the belt The line inner reinforcement 28 (refer to FIG. 2 above) (hereinafter referred to as door panel P7) is made of a material having a specific gravity smaller than that of the door lock reinforcement 58.

In this case, the magnitude relationship of the specific gravity of each material is as described in the first reference example .

  Next, the operation of the vehicle door structure 120 configured as described above will be described.

  In the present embodiment, the center of gravity of the door lock reinforcement 58 is located on the door lock device 40 side of the door body 16. Therefore, if the door panel P7 is made of a material having a specific gravity smaller than that of the door lock reinforcement 58 as in the present embodiment, the door panel P7 becomes lighter than the door hinge 38 of the door body 16. Since the door lock reinforcement 58 whose center of gravity is located on the door lock device 40 side becomes heavy, as a result, the door closing property is improved.

Further, as in the present embodiment, as the mass of the door lock reinforcement 58 increases, as in the first reference example , the entire door 14 is placed on the door lock device 40 side serving as a fulcrum for the inertia moment of the entire door 14. As the center of gravity G2 approaches (see FIG. 6), as a result, the rotational movement of the door alone by the lateral G can be reduced, thereby reducing the moment of inertia of the vehicle 12 in the roll direction (R1 direction) and the yaw direction (R2 direction). it can.

  Further, the door panel P7 other than the door lock reinforcement 58 is reduced in weight, so that the center of gravity G1 of the vehicle 12 moves greatly downward. Thereby, steering stability improves.

[ Fourth embodiment ]
Next, a vehicle door structure 130 according to a fourth embodiment of the present invention will be described with reference to FIG.

The vehicle door structure 130 according to the fourth embodiment of the present invention has the same configuration as that of the vehicle door structure 10 according to the first reference example , and the magnitude relationship of the materials of the members is changed. . Therefore, in the vehicle door structure 130 according to the fourth embodiment of the present invention, the same reference numerals are used for members having the same configurations as those in the first reference example, and the description thereof is omitted. In the vehicle door structure 130 according to the fourth embodiment of the present invention, the door lower frame rear portion 60 is provided on the door lock device 40 side of the door frame 30 provided on the front and rear doors 14. .

And in the door 14 of the front and rear of the vehicle door structure 130 which concerns on 4th embodiment of this invention, the door frame part except the door lower frame rear part 60 among the door frames 30, the door outer panel 18, the door inner panel 20, an impact beam 22, a beltline outer reinforcement 24, a door outer reinforcement 26, a beltline inner reinforcement 28 (refer to FIG. 2 above) (hereinafter referred to as a door panel P8) are provided on the door lower frame rear portion 60. It is made of a material with a specific gravity smaller than that of the material.

In this case, the magnitude relationship of the specific gravity of each material is as described in the first reference example .

  Next, the operation of the vehicle door structure 130 configured as described above will be described.

  In the present embodiment, the center of gravity of the door lower frame rear portion 60 is located on the door lock device 40 side of the door body 16. Therefore, as in the present embodiment, if the door panel P8 is made of a material having a specific gravity smaller than that of the door lower frame rear portion 60, the door panel P8 becomes lighter than the door hinge 38 of the door body 16. Since the door lower frame rear part 60 whose center of gravity is located on the side of the door lock device 40 becomes heavy, the door closing performance is improved as a result.

Further, as in the present embodiment, as the mass of the door lower frame rear portion 60 increases, the entire door 14 is placed on the door lock device 40 side serving as a fulcrum of the inertia moment of the entire door 14 as in the first reference example. As a result, the rotational movement of the door unit by the lateral G can be reduced, and as a result, the moment of inertia of the vehicle 12 in the roll direction (R1 direction) and the yaw direction (R2 direction) can be reduced. Can be reduced.

  Further, the weight of the door panels P8 other than the door lower frame rear portion 60 is reduced, so that the center of gravity G1 of the vehicle 12 moves greatly downward. Thereby, steering stability improves.

[ Fifth embodiment ]
Next, a vehicle door structure 140 according to a fifth embodiment of the present invention will be described with reference to FIG.

The vehicular door structure 140 according to the fifth embodiment of the present invention has the same configuration as the vehicular door structure 10 according to the first reference example described above, and changes the size relationship of the materials of the members. . Therefore, in the vehicle door structure 140 according to the fifth embodiment of the present invention, the same reference numerals are used for members having the same configurations as those in the first reference example, and the description thereof is omitted.

In the front and rear doors 14 of the vehicle door structure 140 according to the fifth embodiment of the present invention, the door outer panel 18, the door inner panel 20, the impact beam 22, the belt line inner reinforcement 28, the door frame 30 (FIG. 2). (Referred to as door panel P9 hereinafter) is made of a material having a specific gravity smaller than that of the beltline outer reinforcement 24 (door outer reinforcement upper) and the door outer reinforcement 26 (door outer reinforcement lower). ing.

In this case, the magnitude relationship of the specific gravity of each material is as described in the first reference example .

  Next, the operation of the vehicle door structure 140 having the above configuration will be described.

  In the present embodiment, the center of gravity of the door 14 as a whole is determined by, for example, the arrangement of the front of the speaker door for the purpose of increasing the mass due to increased rigidity on the door hinge 38 side and the acoustic effect from the front of the occupant, or by setting the door mirror bracket 54. It is in front of the vehicle rather than the front and rear width center. On the other hand, the center of gravity of the belt line outer reinforcement 24 and the door outer reinforcement 26 extending to the front and rear ends of the door is located at the center of the door front and rear width and is located behind the center of gravity of the entire door 14. As a result, the door panel P9 is light and the belt line outer reinforcement 24 and the door outer reinforcement 26 having the center of gravity behind the center of gravity of the entire door 14 are heavier, so that the door closing property is improved.

  Further, as in the present embodiment, the mass of the belt line outer reinforcement 24 and the door outer reinforcement 26 arranged near the upper and lower positions of the door lock device 40 increases, so that The center of gravity G2 of the door 14 as a whole approaches the door lock device 40 side (see FIG. 6). As a result, the rotational movement of the single door by the lateral G can be reduced, and thereby the roll direction (R1 direction) of the vehicle 12 and The moment of inertia in the yaw direction (R2 direction) can be reduced.

Next, a modification of this embodiment will be described.
In the above embodiment, the door panels P9 are made of a material having a specific gravity smaller than that of the beltline outer reinforcement 24 and the door outer reinforcement 26. However, the door panel P9 is made of the beltline outer reinforcement 24 and the door outer reinforcement. The material 26 may be made of a material having a specific gravity smaller than that of at least one of the materials. Even if it does in this way, there can exist the said effect.

[ Fifth Reference Example ]
Next, a vehicle door structure 150 according to a fifth reference example will be described with reference to FIG.

The vehicle door structure 150 according to the fifth reference example has the same configuration as that of the vehicle door structure 10 according to the first reference example , and the size relationship of the materials of the members is changed. Therefore, in the vehicle door structure 150 according to the fifth reference example , the same reference numerals are used for members having the same configuration as in the first reference example, and the description thereof is omitted.

In the front and rear doors 14 of the vehicle door structure 150 according to the fifth reference example , the door outer panel 18, the door inner panel 20, the impact beam 22, the beltline outer reinforcement 24, the door outer reinforcement 26, and the beltline inner The reinforcement 28 and the door frame 30 (refer to FIG. 2 above) (hereinafter referred to as door panels P10) are made of a material having a specific gravity smaller than that of the beltline inner reinforcement 28.

In this case, the magnitude relationship of the specific gravity of each material is as described in the first reference example .

  Next, the operation of the vehicle door structure 150 having the above configuration will be described.

  In the present embodiment, the center of gravity of the door 14 as a whole is determined by, for example, the arrangement of the front of the speaker door for the purpose of increasing the mass due to increased rigidity on the door hinge 38 side and the acoustic effect from the front of the occupant, or by setting the door mirror bracket 54. It is in front of the vehicle rather than the front and rear width center. On the other hand, the center of gravity of the beltline inner reinforcement 28 extending to the front and rear ends of the door is located at the center of the front and rear width of the door and is behind the center of gravity of the entire door 14. As a result, the door panel P10 is light and the belt line inner reinforcement 28 having the center of gravity behind the center of gravity of the entire door 14 becomes heavier, so that the door closing property is improved.

  Further, as in the present embodiment, the mass of the beltline inner reinforcement 28 arranged in the vicinity of the upper portion of the door lock device 40 increases, so that the door lock device 40 side serving as a fulcrum for the inertia moment of the door 14 as a whole. Since the center of gravity G2 of the door 14 as a whole approaches (see FIG. 6), as a result, the rotational movement of the door alone due to the lateral G can be reduced, whereby the roll direction (R1 direction) and yaw direction (R2 direction) of the vehicle 12 can be reduced. The moment of inertia can be reduced. In particular, according to the present embodiment, the center of gravity G2 of the door 14 as a whole moves toward the center of gravity G1 of the vehicle 12, so that the moment of inertia of the vehicle 12 in the roll direction (R1 direction) and the yaw direction (R2 direction) is thereby reduced. Further reduction can be achieved.

[ Sixth Reference Example ]
Next, a vehicle door structure 160 according to a sixth reference example will be described with reference to FIG.

The vehicle door structure 160 according to the sixth reference example is obtained by adding a door division bar 62 to each door frame 30 of the front and rear doors 14 with respect to the vehicle door structure 10 according to the first reference example. In addition, the magnitude relationship of the material of each member is changed. Therefore, in the vehicle door structure 160 according to the sixth reference example , the same reference numerals are used for members having the same configuration as in the first reference example, and the description thereof is omitted.

In the front and rear doors 14 of the vehicle door structure 160 according to the sixth reference example , the door outer panel 18, the door inner panel 20, the impact beam 22, the beltline outer reinforcement 24, the door outer reinforcement 26, and the beltline inner The reinforcement 28 (see FIG. 2 above) (hereinafter referred to as door panel P11) is made of a material having a specific gravity smaller than that of the door division bar 62.

In this case, the magnitude relationship of the specific gravity of each material is as described in the first reference example .

  Next, the operation of the vehicle door structure 160 having the above configuration will be described.

  In the present embodiment, the center of gravity of the door division bar 62 is located on the rear side of the door frame 30, that is, on the door lock device 40 side with respect to the door hinge 38. Therefore, if the door panel P11 is made of a material having a specific gravity smaller than that of the door division bar 62 as in the present embodiment, the door panel P11 becomes lighter, while the door lock device 40 side is closer to the door hinge 38. Since the door division bar 62 whose center of gravity is located on the upper side becomes heavy, the door closing performance is improved as a result.

  Further, the outer shape of the door frame 30 when viewed from the front of the vehicle is, for example, the upper part of the door frame 30 is located on the vehicle center side in view of securing the occupant's living space, centralizing the center of gravity of the vehicle, measures against crosswind, and design. The lower portion of the door frame 30 is positioned on the outer side in the vehicle width direction with respect to the center line of the tire 42 due to the positional relationship with the guard and the aerodynamic characteristics. Therefore, if the door panel P11 is made of a material having a specific gravity smaller than that of the door division bar 62 as in the present embodiment, the door division bar 62 whose center of gravity is located on the inner side in the vehicle width direction becomes heavy. The center of gravity G2 of the entire door 14 is closer to the center of gravity G1 of the entire vehicle 12 than on the center of the tire 42. As a result, the moment of inertia of the vehicle 12 in the roll direction (R1 direction) and the yaw direction (R2 direction) can be reduced.

  In particular, at the front door 14, the center of gravity G1 of the vehicle 12 is lowered because the door panels P11 other than the door division bar 62 are lightened. Thereby, the moment of inertia of the rolling direction (R1 direction) and the yaw direction (R2 direction) of the vehicle 12 can be reduced.

In addition, when at least two of the vehicle door structure 10 of the first reference example to the vehicle door structure 160 of the sixth reference example are combined, the functions and effects of each are combined and the overlapping effects are The effect can be increased. In addition, since the combination of the movement of the center of gravity G2 of the door 14 toward the center of gravity G1 of the vehicle 12 and the door closing property can be selected from the design of the door 14, the relationship of the engine arrangement position, etc., the merchantability is not impaired. It can be reduced weight, improved fuel economy, the CO _2.

[ Seventh Reference Example ]
Next, a vehicle door structure 170 according to a seventh reference example of the present invention will be described with reference to FIG.

In the vehicle door structure 170 according to the seventh reference example of the present invention, the attachment position of the door attachment component is changed with respect to the vehicle door structure 10 according to the first reference example . Therefore, in the vehicle door structure 170 according to the seventh reference example of the present invention, the same reference numerals are used for members having the same configurations as those in the first reference example, and the description thereof is omitted.

In the vehicle door structure 170 according to the seventh reference example of the present invention, the front and rear door main bodies 16 have door hinges that are closer than the center of gravity of the door main body 16 and the door glass 36 when the door glass 36 is fully closed. A plurality of door mounting parts 64 including a window regulator motor are mounted such that the center of gravity is disposed on the side of the door lock device 40 opposite to the side 38 and on the center of gravity of the vehicle.

  Next, the operation of the vehicle door structure 170 having the above configuration will be described.

  In this embodiment, the center of gravity of the plurality of door attachment parts 64 attached to the door body 16 is such that the door lock on the opposite side of the door hinge 38 from the center of gravity of the door body 16 and the door glass 36 when the door glass 36 is fully closed. It is arranged on the device 40 side. Accordingly, the door locking device 40 side is heavier than the door hinge 38 by the plurality of door mounting parts 64, and as a result, the door closing performance is improved.

  Further, if the door mounting component 64 includes a window regulator motor as in the present embodiment, the weight of the door mounting component 64 as a whole is increased by the heavy window regulator motor, so that the door closing performance is further increased. improves.

  In the present embodiment, the center of gravity of the plurality of door attachment parts 64 attached to the door body 16 is closer to the center of gravity G1 of the vehicle 12 than the center of gravity of the door body 16 and the door glass 36 when the door glass 36 is fully closed. Be placed. Accordingly, the center of gravity G2 of the entire door 14 is closer to the center of gravity of the entire vehicle than on the center of the tire 42. As a result, the moment of inertia of the vehicle 12 in the roll direction (R1 direction) and the yaw direction (R2 direction) can be reduced.

  In the present embodiment, the door mounting component 64 includes the window regulator motor. However, the present invention is not limited to this and may be a speaker, a door trim, or the like.

[ Eighth Reference Example ]
Next, a vehicle door structure 180 according to an eighth reference example will be described with reference to FIG.

In the vehicle door structure 180 according to the eighth reference example , the attachment position of the door attachment component is changed with respect to the vehicle door structure 10 according to the first reference example . Therefore, in the vehicle door structure 180 according to the eighth reference example , the same reference numerals are used for members having the same configuration as in the first reference example, and the description thereof is omitted.

In the vehicle door structure 180 according to the eighth reference example , the front and rear door bodies 16 have a door glass 36 that is closer to the belt line than the center of gravity of the door body 16 and the door glass 36 when fully closed. A plurality of door attachment parts 64 (including a window regulator motor, a speaker, and the like) are attached so that the center of gravity is disposed on the belt line side (approaching the belt line) on the lower side.

  Next, the operation of the vehicle door structure 180 having the above configuration will be described.

  In the present embodiment, the center of gravity of the plurality of door attachment parts 64 attached to the door body 16 is located closer to the door lock device 40 than the door hinge 38 of the door body 16. Accordingly, the door locking device 40 side is heavier than the door hinge 38 by the plurality of door mounting parts 64, and as a result, the door closing performance is improved.

  Further, as in the present embodiment, the center of gravity of the plurality of door mounting parts 64 is arranged on the belt line side below the belt line, so that the door lock device 40 side serving as a fulcrum for the inertia moment of the entire door 14 is arranged. Since the center of gravity G2 of the entire door 14 approaches, as a result, the rotational movement of the door alone by the lateral G can be reduced, thereby reducing the moment of inertia of the vehicle 12 in the roll direction (R1 direction) and the yaw direction (R2 direction). it can.

FIG. 1 is a view showing a vehicle to which a vehicle door structure according to a first reference example ( first embodiment of the present invention ) is applied, in which (a) is a plan view of the vehicle and (b) is a side view of the vehicle. (C) is front sectional drawing of a vehicle. FIG. 2 is a view showing a door of a vehicle door structure according to a first reference example ( first embodiment of the present invention ), (a) is a side view of the door, and (b) is an AA of (a). It is line sectional drawing. FIG. 3 is a diagram for explaining the operation of the vehicle door structure according to the first reference example ( first embodiment of the present invention ). 4A and 4B are diagrams for explaining the operation of the vehicle door structure according to the first reference example ( the first embodiment of the present invention ). FIG. 4A is a plan view of the vehicle, and FIG. 4B is a side view of the vehicle. . FIG. 5 is a view for explaining the operation of the vehicle door structure according to one embodiment of the present invention (first embodiment of the present invention ). 6A and 6B are diagrams for explaining the operation of the vehicle door structure according to the first reference example ( the first embodiment of the present invention ), where FIG. 6A is a plan view of the vehicle, FIG. 6B is a sectional view of the door, c) is a modification. FIG. 7 is an enlarged cross-sectional view of the main part showing the internal structure of the vehicle door structure according to the first reference example . FIG. 8 is a view showing a vehicle to which a vehicle door structure according to a second reference example is applied, in which (a) is a plan view of the vehicle, (b) is a side view of the vehicle, and (c) is a front sectional view of the vehicle. FIG. FIG. 9 is a view showing a door of a vehicle door structure according to a second reference example , in which (a) is a side view of the door, and (b) is a sectional view taken along line BB of (a). FIG. 10 is a diagram for explaining the operation of the vehicle door structure according to the second reference example . FIG. 11 is a diagram illustrating the operation of the vehicle door structure according to the second reference example . FIG. 12 is a view showing a modified example of the vehicle door structure according to the second reference example , wherein (a) is a side view of the door, and (b) is a sectional view taken along the line CC of (a). FIG. 13 is a view showing a modified example of the vehicle door structure according to the second reference example , wherein (a) is a side view of the door, and (b) is a sectional view taken along line DD of (a). FIG. 14 is a plan sectional view showing a modification of the vehicle door structure according to the second reference example . FIG. 15: is a figure which shows the door of the door structure for vehicles which concerns on 2nd embodiment of this invention, (a) is a side view of a door, (b) is the EE sectional view taken on the line of (a). FIG. 16 is a view showing a vehicle to which the vehicle door structure according to the third embodiment of the present invention is applied, wherein (a) is a plan view of the vehicle, (b) is a side view of the vehicle, and (c) is a vehicle. FIG. FIG. 17 is a view showing a vehicle to which the vehicle door structure according to the third reference example is applied, in which (a) is a plan view of the vehicle, (b) is a side view of the vehicle, and (c) is a front sectional view of the vehicle. FIG. 18A and 18B are views showing a vehicle to which the vehicle door structure according to the fourth reference example is applied, in which FIG. 18A is a plan view of the vehicle, FIG. 18B is a side view of the vehicle, and FIG. FIG. FIG. 19 is a view showing a vehicle to which a vehicle door structure according to a fourth embodiment of the present invention is applied. (A) is a plan view of the vehicle, (b) is a side view of the vehicle, and (c) is a vehicle. FIG. FIG. 20 is a view showing a vehicle to which a vehicle door structure according to a fifth embodiment of the present invention is applied. (A) is a plan view of the vehicle, (b) is a side view of the vehicle, and (c) is a vehicle. FIG. FIG. 21 is a view showing a vehicle to which a vehicle door structure according to a fifth reference example is applied, in which (a) is a plan view of the vehicle, (b) is a side view of the vehicle, and (c) is a front sectional view of the vehicle. FIG. FIG. 22 is a view showing a vehicle to which the vehicle door structure according to the sixth reference example is applied, in which (a) is a plan view of the vehicle, (b) is a side view of the vehicle, and (c) is a front sectional view of the vehicle. FIG. FIG. 23 is a view showing a vehicle to which a vehicle door structure according to a seventh reference example of the present invention is applied. (A) is a plan view of the vehicle, (b) is a side view of the vehicle, and (c) is a vehicle. FIG. FIG. 23 is a view showing a vehicle to which the vehicle door structure according to the eighth reference example is applied, in which (a) is a plan view of the vehicle, (b) is a side view of the vehicle, and (c) is a front sectional view of the vehicle. FIG.

Explanation of symbols

10, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180 Vehicle door structure 14 Door 16 Door body 18 Door outer panel 20 Door inner panel 22 Impact beam 24 Belt line outer reinforcement (Reinforcing member)
26 Door outer reinforcement (reinforcing member)
28 Beltline inner reinforcement (reinforcement member)
30 Door frame 30A Door frame front part 30B Door frame upper part 30C Door frame rear part 31 Car body frame 32, 34 Projection part 36 Door glass 38 Door hinge 39 Hinge side panel 40 Door lock device 46 Decoration material 48 Connection edge 52 Bracket (Load (Transmission member)
54 Door mirror bracket 56 Door lower frame front part 58 Door lock reinforcement 60 Door lower frame rear part 62 Door division bar 64 Door mounting parts

Claims (5)

A door frame that constitutes a frame portion of the door glass, is configured to have a door frame rear portion on the door lock device side, and whose center of gravity is closer to the rear of the vehicle than the center of gravity of the entire door;
A door body provided on the lower side of the door frame and configured to include a door panel, an impact beam, and a reinforcing member;
With
The door frame rear portion is made of a material having a specific gravity greater than that of the door frame, the door panel, the impact beam, and the reinforcing member except for the door frame rear portion of the door frame. Door structure. A door frame that constitutes a frame portion of the door glass, has a door frame front portion on the door hinge side, and has a center of gravity closer to the rear of the vehicle than the center of gravity of the entire door;
A door body provided on the lower side of the door frame and configured to include a door panel, an impact beam, and a reinforcing member;
With
The door frame portion excluding the door frame front portion of the door frame is made of a material having a specific gravity greater than that of the door frame front portion and the door panel, impact beam, and reinforcing member. Door structure. A door frame that constitutes a frame portion of the door glass and has at least one of a door mirror bracket and a door lower frame front portion on the door hinge side,
A door body provided on the lower side of the door frame and configured to include a door panel, an impact beam, and a reinforcing member;
With
The center of gravity of the door frame part excluding at least one of the door mirror bracket and the door lower frame front part is located closer to the door lock device than the door hinge of the door frame,
Of the door frame, the door frame portion excluding at least one of the door mirror bracket and the door lower frame front portion is made of at least one of the door mirror bracket and the door lower frame front portion, and the material of the door panel, impact beam, and reinforcing member. The vehicle door structure is also made of a material having a large specific gravity . A door frame constituting the frame of the door glass;
A door body provided on the lower side of the door frame and configured to include a door panel, an impact beam, and a reinforcing member;
With
The door panel, impact beam, and reinforcing member are made of a material having a specific gravity smaller than that of the door frame,
The door frame is configured to have a door lower frame rear portion on the door lock device side,
The center of gravity of the door lower frame rear part is located closer to the door lock device than the door hinge of the door frame,
Of the door frame, the door frame portion excluding the door lower frame rear portion, the door panel, the impact beam, and the reinforcing member are made of a material having a specific gravity smaller than that of the door lower frame rear portion. A vehicle door structure characterized by A door frame constituting the frame of the door glass;
A door body provided on the lower side of the door frame and configured to include a door panel, an impact beam, and a reinforcing member;
A door outer reinforcement upper and a door outer reinforcement lower provided in the door body;
With
The door panel, impact beam, and reinforcing member are made of a material having a specific gravity smaller than that of the door frame,
The center of gravity of the door outer reinforcement upper and the door outer reinforcement lower is located at the center of the door front-rear width, and is located behind the center of gravity of the entire door,
The door panel, the impact beam, the reinforcing member, and the door frame are made of a material having a specific gravity smaller than that of at least one of the door outer reinforcement upper and the door outer reinforcement lower. the vehicle door structure.

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