JP4236200B2 - Vehicle rear body structure - Google Patents

Description

  The present invention relates to a rear body structure of a vehicle that supports a rear damper at an upper portion of a rear wheel house.

As a rear body structure of a vehicle, a structure in which an upper end of a rear damper is supported by an upper portion of a rear wheel house is practically used.
The vehicle body rear structure of a practical vehicle is practically sufficient if a stiffener (reinforcing member) is appropriately provided in order to support the upper end of the rear damper at the upper part of the rear wheel house.

As such a vehicle body rear structure, a structure in which a stiffener is disposed on the vehicle side of a rear wheel house is known (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 7-22376 (page 4, FIG. 1)

  FIG. 12 is a diagram for explaining a conventional basic structure. A vehicle body rear structure 260 of a vehicle has a cross member 262 connected to the inside of a rear frame (rear side frame) 261 and a rear wheel house to the outside of the rear frame 261. 263, a wheel house side gusset (stiffener) 264 is provided on the vehicle interior 266 side of the rear wheel house 263, a frame side gusset (stiffener) 265 is extended upward from the rear frame 261, and these gussets 264 and 265 are connected to each other. It is a thing.

  However, the rear body structure 260 of the vehicle has a drawback in that a wheel house side gusset (stiffener) is provided on the vehicle compartment 266 side, so that the vehicle compartment space is pressed and sufficient vehicle compartment space cannot be obtained. .

  In the rear structure of the vehicle body, a wheel house side gusset (stiffener) 264 is provided on the vehicle side of the rear wheel house 263, and a frame side gusset (stiffener) 265 is extended upward from the rear frame 261. Since the two wheels 265 are connected to each other, the reinforcing function of the rear wheel house 263 is exhibited, but there is a problem that it cannot contribute to the improvement of the overall rigidity around the vehicle body frame such as the cross member 262 and the rear frame 261. It was.

  That is, there is a demand for a vehicle body rear structure that can provide a sufficient vehicle compartment space and contribute to an improvement in the overall rigidity of a vehicle body frame such as a cross member and a rear frame.

  It is an object of the present invention to provide a vehicle body rear structure capable of solving the problem that the stiffener reduces the cabin space and ensuring a sufficient cabin space. Also, the present invention provides a vehicle body rear structure that can solve the problem that the stiffener remains in the reinforcement function of the rear wheel house and can contribute to improving the overall rigidity of the body frame such as the cross member and the rear frame. Is an issue.

According to the first aspect of the present invention , a rear wheel house is provided outside the rear frame constituting the vehicle body frame, the upper end of the rear damper is supported by the upper portion of the rear wheel house, and the upper end of the spring is supported by the lower portion of the rear frame. A vehicle body rear structure in which a stiffener is disposed on the wheel side of the wheel house, the stiffener having a U-shaped reinforcing section that forms a closed cross section with the central housing of the rear wheel house , and a center and a damper support for supporting the Riyadanpa by overlapping da damper attachment portion of the housing, and a recess for accommodating the Riyadanpa, extending reinforcing portion, from the upper end of Riyadanpa with formed along a Riyadanpa to the lower end of the rear frame are those issued, the rear frame, the first partition wall and the second partition wall extending in the vehicle width direction is provided, the first partition wall, side view It is a reinforcing material provided continuously to the stiffener reinforcing portion and substantially in the upper part of the coil spring of the rear damper in plan view, and the second partition wall is continuous to the concave portion of the stiffener in side view and rear in plan view. It is a box-shaped reinforcing material provided continuously on the rear cross member passed over the frame .

  For example, if it is possible to secure a sufficient vehicle compartment space, it is advantageous because it can improve the convenience of the vehicle interior. For example, the stiffener is integrated with the body frame such as the cross member and the rear frame. If it is possible to contribute to the improvement of the rigidity, it is preferable because the silence of the vehicle body can be improved.

Therefore, a sufficient cabin space can be secured by arranging the stiffener on the wheel side of the wheel housing.
Further, the stiffener, the cross section U-shaped reinforcing portion to form a closed cross section between the central housing of the rear wheel house, and a damper support for supporting the Riyadanpa by overlapping da damper attachment portion of the central housing, and a recess for accommodating the Riyadanpa, body frame of the reinforcement part, by extending from the upper end of Riyadanpa to the lower end of the rear frame together formed along a Riyadanpa, for example, a stiffener cross member, such as a rear frame It is possible to contribute to the improvement of the overall rigidity.

A first partition and a second partition wall extending in the vehicle width direction to re ya frame provided by connecting the stiffener to the cross member via these first partition wall and the second partition, for example, the cross member Further, the overall rigidity of the body frame such as the rear frame can be improved.
Further, the first partition is a reinforcing member provided continuously to the stiffener reinforcement in side view and substantially above the coil spring of the rear damper in plan view, and the second partition is a recess in the stiffener in side view. And a box-shaped reinforcing material provided continuously on the rear cross member passed to the rear frame in plan view.

In the invention according to claim 1, since the stiffener is disposed on the wheel side of the rear wheel house, a sufficient cabin space can be secured. As a result, there is an advantage that the convenience in the passenger compartment can be improved. In other words, the rear damper can be prevented from falling without sacrificing the indoor space.
Further, the stiffener, the cross section U-shaped reinforcing portion to form a closed cross section between the central housing of the rear wheel house, and a damper support for supporting the Riyadanpa by overlapping da damper attachment portion of the central housing, and a recess for accommodating the Riyadanpa, the reinforcement part, so extending from the upper end of Riyadanpa to the lower end of the rear frame together formed along a Riyadanpa, for example, a vehicle body comprising a cross member stiffener, from such rear frame This can contribute to the improvement of the overall rigidity of the frame. As a result, there is an advantage that the quietness of the vehicle body can be improved.

A partition wall extended in the vehicle width direction is provided in the re-ya frame, since the connecting stiffener through the partition wall in the cross member, for example, be further improved overall rigidity of the body frame including a cross member, a rear frame There is an advantage that can be.
Further, the first partition is a reinforcing member provided continuously to the stiffener reinforcement in a side view and substantially above the coil spring of the rear damper in a plan view, and the second partition is a stiffener in a side view. A box-shaped reinforcing material is provided continuously in the recess and continuously in the rear cross member that is passed to the rear frame in plan view.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a perspective view of a vehicle employing a vehicle body rear structure according to the present invention.
In the figure, 10 is a vehicle, 12 is a body frame, 13 is a passenger compartment, 14 is a front bumper, 15 is a front fender, 16 is a front wheel, 17 is a rear wheel as a wheel, 18 is a front door, 19 is a rear door, 21 Is a tailgate, 22 is a rear bumper, 23 is a bonnet, 24 is a roof, 26 is a rear suspension, 27 is a rear wheel house, and 60 is a vehicle rear structure according to the present invention.

FIG. 2 is a side view of the rear body structure of the vehicle according to the present invention, showing the side of the right rear wheel 17.
The vehicle body rear structure 60 includes a vehicle body frame 12, a rear suspension 26 that is swingably attached to the rear portion of the vehicle body frame 12, left and right rear wheel houses (wheel wheel houses) 27 provided at the rear portion of the vehicle body frame 12, The rear wheel house 27 has a structure including first partition walls 28 and 28 as partition walls and second partition walls 29 and 29 as partition walls provided around the rear frame 43 of the body frame 12 of the vehicle body frame 12. 1) This is a structure of the rear portion of the vehicle body that can take up a maximum space and prevent the rear damper (damper) 62 from falling over.

  FIG. 3 is a plan view of the body frame of the rear body structure of the vehicle according to the present invention. The body frame 12 extends to the left and right front side frames 41, 41 and the front side frames 41, 41 to the rear of the body. Left and right side frames (floor frames) 42L, 42R, left and right rear frames (rear side frames) 43, 43 extending rearward from the side frames 42L, 42R, and front portions of the left and right side frames 42L, 42R , A second cross member 45 that connects the middle of the left and right side frames 42L, 42R, a third cross member 46 that connects the rear portions of the left and right side frames 42L, 42R, and the left and right side frames 42L. , 42R respectively extended outward from the connection position of the first cross member 44. Right first outriggers (extension members) 47, 47 and left and right second outriggers (extension members) 48, 48 extending outward from the connection positions of the second cross members 45 of the left and right side frames 42L, 42R, The left and right third outriggers (extension members) 49, 49 extending outward from the connection positions of the third cross members 46 of the left and right side frames 42L, 42R, and the tips of the left first to third outriggers 47-49, respectively. The left front side sill 52L connected to the left side, the right front side sill 52R connected to the tip of the right first to third outriggers 47 to 49, and the left and right side frames 42L, 42R behind the third cross member 46 The horizontal connecting member 53 to be connected, the first rear cross member 54 passed to the left and right rear frames 43, 43, A side sill extending portion 58L of the left extended from a side sill extending portion 58R of the right extended from the rear end of the right front side sill 52R, consists.

  In the figure, 55 is a second rear cross member serving as a cross member passed to the rear of the left and right rear frames 43, 43, 56 is a third rear cross member passed to the rear of the left and right rear frames 43, 43, 57 , 57 are left and right rear outriggers extending outward from the connection position of the first rear cross member 54, and 59, 59 are a pair of vertical members that are passed from the third rear cross member 56 to the second rear cross member 55.

  The left side sill 51L includes a left front side sill 52L and a left side sill extension 58L. Further, the right side sill 51R includes a right front side sill 52R and a right side sill extension 58R.

  FIG. 4 is a plan view of the rear suspension of the vehicle body rear structure according to the present invention. The rear suspension 26 has a suspension arm (suspension frame) 61 and one end attached to the suspension arm 61 and the other end attached to the body frame 12. (See FIG. 3) Semi-tray mainly composed of left and right rear dampers (cushion absorbers) 62, 62 supported on the side and coil springs (coil springs) 63, 63 as left and right springs supported by the suspension arm 61. It is a ring type suspension.

  The suspension arm 61 is provided on the left and right trailing arms 64, 64, the cross beam 65 passed to the left and right trailing arms 64, 64, and the left and right trailing arms 64, 64, respectively. 17 and knuckle 66, 66 that supports 17.

  The trailing arm 64 is provided on the right trailing arm 64 for attaching the bush assembly 67 provided on the left trailing arm 64 for swingably attaching to the vehicle body frame 12 (see FIG. 3) and the rear damper 62. The mounting portion 68, a coil spring receiving portion 69 for receiving the coil spring 63, and a bracket (holder portion) 72 for mounting the bush assembly 67 to the left trailing arm 64 via a support shaft 71.

FIG. 5 is an exploded perspective view of the rear wheel house of the rear body structure of the vehicle according to the present invention, and shows the right rear wheel house 27.
The rear wheel house 27 includes a front housing 81 that covers the front of the rear wheel 17 (see FIG. 1), a central housing 82 that covers the center of the rear wheel 17, a rear housing 83 that covers the rear of the rear wheel 17, and a central housing. An upper plate 84 that is integrally attached to the upper portion of 82, a stiffener (reinforcing member) 85 that is integrally attached to the rear wheel (wheel) 17 side of the central housing 82, and an under holder 86 that covers the lower portion of the stiffener 85. .

The central housing 82 has a damper mounting portion 87 formed at the top.
The stiffener 85 houses a U-shaped reinforcing section 91 that forms a closed section with the central housing 82, a damper support section 92 that supports the rear damper 62 by being superimposed on the damper mounting section 87, and the rear damper 62. And a concave portion 93 to be provided.
The reinforcing portion 91 is formed along the rear damper 62 and extends from the upper end of the rear damper 62 to the lower end of the rear frame 43.

  FIG. 6 is a perspective view around the rear wheel house of the rear body structure of the vehicle body according to the present invention. First partition walls (gussets) 28 and 28 are formed of a rear frame 43 formed in a substantially U-shape of the body frame 12. A box-shaped member that extends in the vehicle width direction in the U-shaped portion 95 and is provided continuously to the reinforcing portion 91 of the stiffener 85 in a side view and substantially above the coil spring 63 (see FIG. 2) in a plan view. Reinforcing material.

  The second partition walls (gussets) 29, 29 are members extending in the vehicle width direction in the U-shaped portion 95 of the rear frame 43 formed in a substantially U shape of the vehicle body frame 12, and are recessed portions of the stiffener 85 in a side view. A box-shaped reinforcing material provided continuously to the second rear cross member (rear cross member) 55 in a plan view.

  FIG. 7 is a perspective view of the vehicle rear structure of the vehicle according to the present invention. The vehicle rear structure 60 of the vehicle supports the upper end of the rear damper 62 on the rear wheel house 27 and the upper end of a coil spring (spring) 63 on the rear. The vehicle body rear structure is supported by the lower portion of the frame 43, and the stiffener 85 is disposed on the rear wheel (wheel) 17 side of the rear wheel house 27. The stiffener 85 is closed between the rear wheel house 27 and the rear wheel house 27. It can be said that the reinforcing portion 91 is formed along the rear damper 62 and extends from the upper end of the rear damper 62 to the lower end of the rear frame 43.

  For example, if it is possible to secure a sufficient vehicle compartment space, it is advantageous because it can improve the convenience of the vehicle interior. For example, the stiffener is integrated with the body frame such as the cross member and the rear frame. If it is possible to contribute to the improvement of the rigidity, it is preferable because the silence of the vehicle body can be improved.

FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7, and by arranging the stiffener 85 on the rear wheel (wheel) 17 side of the rear wheel house 27, a sufficient cabin space can be secured. As a result, the convenience in the passenger compartment 13 can be improved. In other words, it is possible to prevent the rear damper 62 from falling without sacrificing the space of the passenger compartment (indoor) 13.
Further, the stiffener 85 is provided with a reinforcing portion 91 that forms a closed cross section with the rear wheel house 27. The reinforcing portion 91 is formed along the rear damper 62 and from the upper end of the rear damper 62 to the lower end of the rear frame 43. For example, the stiffener 85 can contribute to the improvement of the overall rigidity of the vehicle body frame 12 such as the cross member (second cross member) 55 and the rear frame. As a result, the quietness of the vehicle body can be improved.

  FIG. 9 is a view taken in the direction of arrow 9 in FIG. 7. The vehicle body rear structure 60 of the vehicle is provided with partition walls 28, 28 and partition walls 29, 29 extending in the vehicle width direction on the rear frame 43. , 29, the stiffener 85 is connected to the second rear cross member (cross member) 55. In addition, the partition walls 29 and 29 indicate that they are disposed in the vicinity of the front and rear side walls 55a and 55b of the second rear cross member 55.

The rear frame 43 is provided with partition walls 28 and 28 and partition walls 29 and 29 extending in the vehicle width direction, and the stiffener 85 is connected to the second rear cross member (cross member) 55 through the partition walls 28 and 28 and the partition walls 29 and 29. it is, for example, the second rear cross member 55, it is possible to further improve the overall rigidity of the body frame 12 such Riyafure beam 4 3.

FIGS. 10A and 10B are comparative explanatory views showing the influence of the vehicle body rear structure of the vehicle according to the present invention on the passenger compartment, and FIG. 10A shows a vehicle body rear structure 160 of the vehicle of the comparative example. ) Shows the vehicle body rear structure 60 of the vehicle of the embodiment.
In (a), a rear body structure 160 of a vehicle includes a rear frame (rear side frame) 161 provided with a rear wheel house 162, and a stiffener 164 attached to the rear frame 161 and the rear wheel house 162 from the vehicle compartment 163 side. Therefore, it is difficult to effectively use the space in the passenger compartment 163. Reference numeral 165 denotes a cross member extending from the rear frame 161 in the vehicle width direction.

  In (b), since the vehicle body rear structure 60 has the stiffener 85 arranged on the wheel (rear wheel) 17 (see FIG. 1) side of the rear wheel house 27, a sufficient space in the passenger compartment 13 can be secured. . As a result, the convenience in the passenger compartment can be improved.

FIGS. 11A and 11B are explanatory views showing a comparison of the rigidity of the vehicle body rear structure of the vehicle according to the present invention. FIG. 11A shows a vehicle body rear structure 160 of the vehicle of the comparative example, and FIG. An example vehicle rear body structure 60 is shown.
In (a), the vehicle body rear structure 160 in other words passes the cross members 165 to the left and right rear frames 161, 161, and the left and right rear frames 161, 161 are provided with left and right rear wheel houses 162, 162, respectively. These rear wheel houses 162 and 162 are reinforced by stiffeners 164 and 164, respectively, and the overall rigidity of the vehicle body frames such as the rear frames 161 and 161 and the cross member 165 cannot be effectively increased.

In (b), the vehicle body rear structure 60 includes stiffeners 85 and 85 having reinforcing portions 91 and 91 that form a closed cross section with the rear wheel houses 27 and 27, and the reinforcing portions 91 and 91 are arranged on the rear frame. The lower frames 43 and 43 are extended to the lower ends, and the partition walls 29 and 29 are provided on the rear frames 43 and 43, so that the stiffeners 85 and 85 can be used as vehicle bodies such as the cross members (second rear cross members) 55 and the rear frames 43 and 43. This can contribute to the improvement of the overall rigidity of the frame.

  In the vehicle body rear structure according to the present invention, as shown in FIG. 4, the reinforcing portion that forms a closed cross section with the rear wheel house is formed in a U-shape in cross section. For example, it may be U-shaped or W-shaped as long as it forms a closed cross section with the rear wheel house.

  As shown in FIG. 6, the vehicle body rear structure of the vehicle according to the present invention is provided with partition walls 28, 28 and partition walls 29, 29 extending in the vehicle width direction on the rear frame 43. However, the present invention is not limited to this. The number of is arbitrary.

  The vehicle body rear structure according to the present invention is suitable for use in mounting a rear damper such as a minivan or a passenger car.

1 is a perspective view of a vehicle that employs a vehicle body rear structure according to the present invention. 1 is a side view of a vehicle body rear structure according to the present invention. It is a top view of the vehicle body frame of the vehicle body rear part structure according to the present invention. It is a top view of the rear suspension of the vehicle body rear part structure according to the present invention. It is a disassembled perspective view of the rear wheel house of the vehicle body rear part structure according to the present invention. It is a perspective view around the rear wheel house of the vehicle body rear structure of the vehicle according to the present invention. 1 is a perspective view of a vehicle body rear structure according to the present invention. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7. FIG. 9 is a view taken along arrow 9 in FIG. 7. It is a comparative explanatory view showing the influence with respect to the passenger compartment of the rear body structure of the vehicle according to the present invention. It is explanatory drawing which shows the rigidity comparison of the vehicle body rear part structure of the vehicle which concerns on this invention. It is a figure explaining the conventional basic composition.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 12 ... Body frame, 17 ... Wheel (rear wheel), 27 ... Rear wheel house, 28, 29 ... Partition wall (first and second partition walls), 43 ... Rear frame, 55 ... Cross member (second Rear cross member), 60 ... rear body structure of vehicle, 62 ... rear bumper, 85 ... stiffener, 91 ... reinforcing part.

Claims (1)

A rear wheel house is provided outside the rear frame that constitutes the body frame, the upper end of the rear damper is supported by the upper part of the rear wheel house, the upper end of the spring is supported by the lower part of the rear frame, and the stiffener on the wheel side of the rear wheel house. Vehicle body rear structure of the type of arrangement,
The stiffener damper support for supporting the cross section U-shaped reinforcing portion to form a closed cross section between the central housing of the rear wheel houses, the Riyadanpa by overlapping da damper attachment portion of the central housing When, and a recess for accommodating the Riyadanpa, the reinforcing portion, which extends from the upper end of the Riyadanpa to the lower end of the rear frame together formed along a said Riyadanpa,
The rear frame is provided with a first partition and a second partition extending in the vehicle width direction,
The first partition is a reinforcing material provided continuously to the reinforcing portion of the stiffener in a side view and substantially above the coil spring of the rear damper in a plan view, and the second partition is the stiffener in a side view. A vehicle body rear structure, characterized in that it is a box-shaped reinforcing member that is continuously provided in a recess of the vehicle and continuously provided on a rear cross member that is passed to the rear frame in plan view .

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