JP2010143410A - Vehicle rear part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle rear part structure for preventing damage to or the breakage of an article when held between a lid front end and the upper part of a bumper during the over-stroke of a trunk lid to the lower side. <P>SOLUTION: The vehicle rear part structure 1 includes a retainer 30 mounted on a lower back panel 20, and the bumper 40 supported by the retainer 30. The retainer 30 has a receiving part 32 which is expanded horizontally from a position distant downward from the lid front end 13 during closing the trunk lid and to which the upper part of the bumper 40 is fixed. The upper part of the bumper 40 is provided with flexible parts 42, 43 which are arranged on the lower side of the lid front end 13 during closing the trunk lid, and a mounting part 45 which is protruded from the front ends of the flexible parts 42, 43 and fixed to the receiving part. The flexible parts 42, 43 are arranged above the receiving part 32 via a cavity S1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure of a rear part of an automobile, and particularly relates to a mounting structure of a bumper and a retainer that supports the bumper.

  FIG. 3 shows a sectional view of a conventional vehicle rear structure 100. In FIG. 3, 101 is a bumper, 102 is a trunk lid, and 103 is a lower back panel. The bumper 101 is attached to the lower back panel 103 via the attachment bracket 104. The upper portion of the bumper 101 is attached to the mounting bracket 104 so that the upper portion of the bumper 101 is close to the lid distal end portion 102A below the lid distal end portion 102A when the trunk lid is closed.

  The mounting bracket 104 has an L-shaped cross section as shown in the figure, and the upper portion of the bumper 101 is fixed to the horizontal portion 104A with bolts, nut fastening means (not shown) or an adhesive. Further, the vertical wall portion 104B constituting the mounting bracket 104 is also fixed to the lower back panel 103 by bolts and nuts fastening means or the like (not shown).

  In order to increase the rigidity of the lower back panel 103, a reinforcement 105 is joined to the lower back panel 103. A weather strip 106 is attached to the flange where the lower back panel 103 and the reinforcement 105 are joined to prevent intrusion of rainwater or the like.

When the trunk lid is closed, the weather strip 106 elastically contacts the inner panel 102 </ b> B constituting the trunk lid 102. The lower edge portion of the outer panel 102C is hemmed to the lower edge portion of the inner panel 102B to form a flange portion. This flange portion forms the above-described lid tip portion 102A.
When the trunk lid is closed, the gap between the lid tip 102A and the upper part of the bumper 101 is set to be a predetermined distance D [mm].

Patent Document 1 discloses a vehicle rear structure in which a bumper is fixed to a lower back panel via a retainer.
JP 09-011823 (paragraph [0002], FIG. 5)

  In the conventional vehicle rear structure, as shown by a chain line in FIG. 3, when the trunk lid 102 overstrokes downward, if an object is sandwiched between the lid tip 102A and the upper part of the bumper 101, the trunk lid 102 is Since the object is pressed against the bracket 104, the object may be damaged or the object may be damaged if the load is very large.

  The present invention was created in view of the above points, and even when an object is sandwiched between the lid tip and the upper part of the bumper when the trunk lid overstrokes downward, the object may be damaged. An object of the present invention is to provide a vehicle rear structure that can prevent an object from being damaged.

In order to achieve the above object, the present invention provides a vehicle rear structure including a retainer attached to a lower back panel and a bumper supported by the retainer, and the retainer moves downward from the front end of the lid when the trunk lid is closed. It has a receiving part that extends horizontally or in an inclined direction at a distance and is fixed to the upper part of the bumper. The upper part of the bumper can be placed under the lid tip when the trunk lid is closed. The flexible part has a mounting part protruding from the tip part of the flexible part and fixed to the receiving part, and the flexible part is disposed above the receiving part via a gap. It is said.
In the vehicle rear structure according to the present invention, the flexible portion includes an inclined portion that becomes higher from the rear of the vehicle toward the front of the vehicle, and a horizontal portion that extends horizontally forward from the front end of the inclined portion via the bent portion. Extends from the front end of the horizontal portion, and the bent portion is located directly below the front end of the lid when the trunk lid is closed.
In the vehicle rear portion structure of the present invention, preferably, the distance between the flexible portion and the receiving portion is set to be longer than the distance moved from the specified closed position when the trunk lid overstrokes.

  According to the present invention, even when an object is sandwiched in the gap between the lid tip and the upper part of the bumper cover when the trunk lid is closed, the load acting on the object due to the deformation of the flexible portion can be absorbed. Thereby, the load added to a thing can be reduced and it can prevent getting a crack. In addition, when the load is large, it is possible to prevent the possibility of the object being damaged. Therefore, even if a finger or the like is caught, strong pressure is not received.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the figure, Fr indicates the front of the vehicle, and Up indicates the upper side of the vehicle.

  FIG. 1 is a cross-sectional view of a vehicle rear structure 1 according to an embodiment of the present invention, in which 10 is a trunk lid, 20 is a lower back panel, 30 is a retainer, and 40 is a bumper.

  The trunk lid 10 is configured by joining the peripheral edges of the inner panel 11 and the outer panel 12 with a urethane-based adhesive. In the illustrated example, the lower edge of the outer panel 12 is hemmed to the lower edge of the inner panel 11. Connected to form a flange portion. This flange portion forms the lid tip portion 13.

  The lower back panel 20 is arranged so that the surface extends in the vehicle width direction with the vehicle rearward, and the reinforcement has a closed cross section on the vehicle front side of the lower back panel 20 so as to increase rigidity although not shown. Joined to define.

  A weather strip 50 is attached to the flange portion 21 where the lower back panel 20 and the reinforcement are joined. When the trunk lid is closed, the weather strip 50 elastically contacts the inner panel 11 constituting the trunk lid 10 as shown in the figure.

A retainer 30 is attached to a surface of the lower back panel 20 facing the rear of the vehicle by fastening means such as bolts and nuts (not shown).
The retainer 30 supports the bumper 40, and is configured to have a substantially L-shaped cross section from a vertical wall portion 31 and a receiving portion 32 that extends horizontally from the upper end of the vertical wall portion 31 to the vehicle rear side. Yes. As shown in FIG. 1, the retainer 32 of the retainer 30 spreads in the horizontal direction at a position spaced downward from the lid tip 13 when the trunk lid is closed. The retainer 30 is made of sheet metal.

The upper portion of the bumper 40 is fixed to the receiving portion 32. The bumper 40 is made of, for example, urethane resin, and an upper portion of the bumper 40 is, as illustrated, a first inclined portion 41 that increases in order from the rear toward the vehicle front side, and an upper end of the first inclined portion 41 toward the vehicle front side. A second inclined portion 42 inclined more gently than the first inclined portion 41, a horizontal portion 43 extending horizontally from the upper end of the second inclined portion 42 toward the front of the vehicle, and the horizontal portion 43 A third inclined portion 44 projecting obliquely forward and downward from the tip, a mounting portion 45 extending horizontally forward from the tip of the third inclined portion 44, and extending obliquely forward and upward from the tip of the horizontal portion 43 Projecting portion 46.
The mounting portion 45 is fixed to the receiving portion 32 with bolts and nut fastening means (not shown) or an adhesive.

  Here, in the vehicle rear structure 1 of the present embodiment, the second inclined portion 42 and the horizontal portion 43 are configured as a flexible portion disposed below the lid tip portion 13 when the trunk lid is closed, and the bumper The upper part of 40 has a cushion function. That is, the flexible portion bends downward when a load of a predetermined size or more acts from above, and restores the shape before deformation when released from pressing by the load.

For this reason, the second inclined portion 42 and the horizontal portion 43 forming the flexible portion are received so that they do not come into contact with the receiving portion 32 while being fixed to the receiving portion 32 that constitutes the upper portion of the bumper 40. It is characterized by being disposed above the portion 32 via a gap S1.
In the present embodiment, the second inclined portion 42 and the horizontal portion 43 constituting the flexible portion are coupled via a bent portion 47, and the bent portion 47 of the lid tip 13 is closed when the trunk lid is closed. It is arranged to be located directly below.

As described above, the flexible portion is formed to be bent into a square shape or a mountain shape. Therefore, when a desired force acts downward, the flexible portion can be bent due to elasticity. That is, in a normal time when a downward load is not applied to the flexible part, when an angle formed by the second inclined part 42 and the horizontal part 43 is θ1, when a force of a predetermined magnitude or more is applied, The flexible portion bends so that the angle formed by the second inclined portion 42 and the horizontal portion 43 is θ2 (θ2> θ1: see FIG. 2 described later).
Here, the load F when the flexible portion is deformed is, for example, the load due to the weight of the bumper 40 being F1, and when the object is sandwiched in the gap between the lid tip 13 and the upper portion of the bumper 40, the load is applied to the object. Assuming that the flawed load is F2, F1 <F <F2.

  When the trunk lid is closed, the gap between the lid tip 13 and the upper portion of the bumper 40 is set to a [mm], and when the trunk lid 10 overstrokes (the trunk lid 10 in FIG. The gap of (shown) is set to b [mm] (where b <a). In the present embodiment, the distance D1 between the flexible portion and the receiving portion 32 is set to be longer than the distance that the trunk lid 10 moves from the specified closed position when the trunk lid 10 overstrokes, that is, [ab]. desirable.

The vehicle rear structure 1 according to the present embodiment is configured as described above, and when the trunk lid is closed, an object is sandwiched in the gap S2 between the lid tip 13 and the upper portion of the bumper 40, and for example, the thickness t of the object Is smaller than the normal gap a [mm], when the trunk lid 10 overstrokes, the lid tip portion 13 of the trunk lid 10 presses the object against the second inclined portion 42 and the horizontal portion 43 as flexible portions. At that time, if the force F acting on the second inclined portion 42 and the horizontal portion 43 is F1 <F <F2, the second inclined portion 42 and the horizontal portion 43 receive the flexible portion and the receiving portion as shown in FIG. It deform | transforms using the space | gap S1 between the parts 32. FIG.
Thereby, a flexible part deform | transforms from the form at the time of normal, and absorbs a load. After absorbing the load, the deformed flexible part is restored to its original state by its elasticity.

  Thus, according to the vehicle rear portion structure 1 according to the embodiment of the present invention, even when an object is sandwiched in the gap S2 between the lid tip portion 13 and the upper portion of the bumper 40 when the trunk lid is closed, the flexible portion is By deforming and acting as a cushion, a load acting on the object can be absorbed. Thereby, the load added to a thing can be reduced and it can prevent getting a crack. Moreover, even when the load is large, it is possible to prevent the possibility of the object being damaged.

  In the vehicle rear structure of the present embodiment, the load can be controlled from the trunk lid 10 while maintaining a good appearance at the upper part of the bumper 40 disposed in the gap between the trunk lid 10 and the retainer 30.

Although detailed above, the present invention can be implemented in various forms without departing from the spirit of the present invention.
The dimensions and angle of the flexible portion are not limited to the illustrated examples, and it is of course possible to finely adjust the amount of deflection with respect to the load by changing the thickness, height, and angle.
In the said embodiment, although the upper part of a bumper is provided with the protrusion part, this protrusion part may be abbreviate | omitted.
Although the flexible part of the said embodiment illustrated what the 2nd inclination part and the horizontal part were comprised in the shape of a square shape or the mountain shape via the bending part, a flexible part becomes such a shape. For example, the bent portion may be omitted to form a curved shape.
In the retainer of the said embodiment, although the case where a receiving part spreads in the horizontal direction was shown, the receiving part may spread as a inclined surface which inclined the horizontal surface by the predetermined angle.

It is sectional drawing of the vehicle rear part structure which concerns on embodiment of this invention. It is sectional drawing at the time of a deformation | transformation of the vehicle rear part structure of FIG. It is sectional drawing of the conventional vehicle rear part structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle rear part structure 10 Trunk lid 11 Inner panel 12 Outer panel 13 Lid tip part 20 Lower back panel 21 Flange part 30 Retainer 31 Vertical wall part 32 Receiving part 40 Bumper 41 1st inclination part 42 2nd inclination part 43 Horizontal part 44 1st 3 Inclined portion 45 Mounting portion 46 Protruding portion 47 Bending portion 50 Weather strip

Claims (3)

A vehicle rear structure comprising a retainer attached to the lower back panel and a bumper supported by the retainer,
The retainer has a receiving portion to which the upper portion of the bumper is fixed by spreading in a horizontal direction or an inclined direction at a position spaced downward from the lid tip when the trunk lid is closed,
The upper part of the bumper includes a flexible part disposed below the front end of the lid when the trunk lid is closed, and a mounting part protruding from the front end of the flexible part and fixed to the receiving part. Have
The vehicle rear structure, wherein the flexible portion is disposed above the receiving portion via a gap. The flexible portion is composed of an inclined portion that increases as it goes from the rear of the vehicle to the front of the vehicle, and a horizontal portion that extends horizontally forward from the front end of the inclined portion via the bent portion,
The mounting portion extends from the front end of the horizontal portion,
The vehicle rear portion structure according to claim 1, wherein the bent portion is positioned immediately below the front end of the lid when the trunk lid is closed.   The vehicle rear portion structure according to claim 1 or 2, wherein a distance between the flexible portion and the receiving portion is longer than a distance moved from a predetermined closed position when the trunk lid overstrokes.