JP2007137080A - Bumper mounting structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mount bumpers with different shapes while using a common vehicle body structure, flexibly cope with a change of a shape without restriction of size, reduce costs, and improve productivity. <P>SOLUTION: A rear bumper 11 has a flange part 111a extending inward of a vehicle width direction in a wheel house, and a resin bracket 1 is mounted on a vehicle rear side of the flange part 111a, so that the rear bumper 111 is mounted to a vehicle body via the bracket 1. The bracket 1 is molded of resin, so as to flexibly cope with a change of a shape without restriction of size, reduce costs, and improve productivity. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle bumper mounting structure capable of mounting a plurality of types of bumpers while maintaining a common vehicle body structure.

  Conventionally, bumper mounting that allows different bumper shapes to be mounted with the same vehicle body structure, such as when changing the appearance of the bumper or when changing the exterior design of the vehicle, etc. There is a structure. In this type of mounting structure, there is a restriction that the fixing points of the vehicle body must be shared.

  For example, when there is a design change to expand the bumper shape in the vehicle width direction from the original, it is conceivable to extend the fixed point at the bumper end in the vehicle width direction to the vehicle body side fixed point. However, such a change in the shape of the end (detail) of the bumper is not easy to manufacture in a bumper to be molded, and is not necessarily preferable in view of cost and productivity.

  Specifically, when an over fender is attached along the shape of the wheel house to a vehicle in which a part of the outer shape of the wheel house is formed by the end of the bumper that wraps around the side of the vehicle body, The shape of the bumper of the over fender is also changed to provide continuity. Specifically, in consideration of productivity and commonality, the body panel is a change that does not change the shape and adds a mounting hole, and the bumper takes charge of the outward bulging in the vehicle width direction. Become. In other words, the bumper surface moves to the outside in the vehicle width direction and the tire side by the amount corresponding to the over fender as compared to the bumper for vehicles without the over fender. Since the mounting position of the vehicle body is not usually changed, a long stay (mounting leg) is required at the mounting portion of the bumper that is a part of the outer shape of the wheel house, in other words, the fixing point is extended. It is necessary to change the shape of the bumper ends (details) to be put out, which hinders the mold configuration.

  Therefore, there is a technique for fixing the vehicle body side fixing portion and the fixing portion of the bumper end portion via a bracket. If this technique is used, the above-mentioned problems relating to the formation of the bumper can be solved, and bumpers of different sizes can be easily attached while sharing the vehicle body structure.

  Further, as a prior art of this type of bumper mounting structure, a bumper mounting structure as disclosed in Patent Document 1 has been proposed.

JP-A-8-91152

  However, when a metal such as a sheet metal is used for the bracket, for example, when fixing with a bolt at the fixing point of the bumper, a flat portion for attaching the nut must be secured, and so on the dimension on the processing surface. Therefore, it is impossible to flexibly cope with the shape change. In particular, when the shape spread in the vehicle width direction is slight, it is not necessarily preferable in consideration of the non-easiness of processing, productivity, and cost.

  In addition, when there is a shape change in which the position of the bumper fixing point is shifted in the vehicle front-rear direction, it is necessary to bend the plane portion of the bracket by bending it in the vehicle front-rear direction, for example, to form an R shape. It is difficult to say that bending is preferable in view of non-easiness of processing, productivity, and cost.

  In view of the actual situation, it is possible to attach bumpers having different shapes while keeping the vehicle body structure in common, and in that case, it is possible to flexibly change the shape without being restricted by the size or the like. We propose a vehicle bumper mounting structure that can be used to reduce costs and improve productivity.

  In the bumper mounting structure of the present invention, a part of the outer shape of the wheel house is formed by the end of the bumper that wraps around the side of the vehicle body, and the wheel house is arranged on the outer side in the vehicle width direction of the outer panel that becomes the design surface of the vehicle. A bumper mounting structure for a vehicle in which an over fender is mounted along a shape, and a flange portion extending inward in the vehicle width direction in the wheel house is provided at an end portion of the bumper, on a vehicle rear side of the flange portion. A resin bracket is attached, and the bumper is attached to the vehicle body via the bracket.

  Further, the outer panel has a flange portion extending inward in the vehicle width direction in the wheel house, a fitting hole is provided in the flange portion of the outer panel, and the outer panel is formed to protrude from a peripheral edge of the mounting hole on the vehicle body side of the bracket. The engaging portion is engaged with the fitting hole.

  Further, the engaging portion is constituted by a claw piece projecting and arranged facing the periphery of the vehicle body side mounting hole, and the inner width or inner diameter of the claw piece is gradually reduced or reduced with respect to the inner diameter of the vehicle body side mounting hole. It is formed to have a diameter.

  In addition, a lining constituting an inner surface of the wheel house is disposed in the wheel house, the lining is overlapped with the mounting hole on the vehicle body side of the bracket, and the bracket and the lining are shared by a screw for expanding the claw piece. It is characterized by tightening.

  According to the bumper mounting structure of the present invention, since the bumper and the vehicle body are mounted via the bracket, the bumper mold configuration and formability are improved, and the bumper can be easily manufactured. In addition, the bumper can be easily attached while the vehicle body structure is shared.

  In addition, since the bracket is formed of resin, the degree of freedom of shape is improved, and it is possible to flexibly respond to design changes as compared with metal brackets such as sheet metal. Also, when the bumper is mounted, the bracket is fixed in a state protruding from the end of the bumper inward in the vehicle width direction, but since it is molded of resin, it contacts the vehicle body components when assembled to the vehicle. It is possible to avoid scratches and improve workability, productivity, and cost.

  In addition, the bracket can be temporarily held by providing a fitting portion with the vehicle body, thereby improving workability. Further, the engaging portion is disposed opposite to the periphery of the vehicle body side mounting hole, and the claw piece is gradually reduced or reduced in diameter with respect to the vehicle body side mounting hole. The inner diameter becomes smaller than the inner diameter, and the engaging portion plays the role of a nut when screwing in the screw, and can be fastened with sufficient rigidity. In addition, the number of parts can be reduced and processing steps can be reduced.

  A preferred embodiment of a bumper mounting structure according to the present invention will be described below with reference to the drawings. 1 is a side view of an example vehicle 100 according to an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is a rear view. Hereinafter, the vehicle 100 will be schematically described. The vehicle 100 has a monocoque body (hereinafter simply referred to as a body), and an engine is mounted in an engine room at the front of the body. In each figure, the vehicle and the rear are represented by arrows Fr and Rr, respectively.

  101 is a front bumper, 102 is a fender panel attached symmetrically in the vehicle width direction, and 103 is a front hood. An outline appearance design of the front portion of the body is constituted by these three types of components.

  In the vehicle 100, a front wheel house 104 is formed by a front bumper 101 and a fender panel 102. A front fender lining (not shown) is attached to the inner surface of the front wheel house 104 to cover the inner surface of the front wheel house 104, and the front wheel 105 is arranged in the front wheel house 104.

  The vehicle 100 also has a front over fender 106. The front over fender 106 is attached so as to extend outward in the vehicle width direction along the shape of the front wheel house 104. Further, the front over fender 106 may be attached to the fender panel 102, but may be integrally formed.

  Reference numeral 107 denotes a front side door, and reference numeral 108 denotes a rear side door. Reference numeral 109 denotes a roof. Reference numeral 110 denotes a side outer panel, which is attached symmetrically in the vehicle width direction. Reference numeral 111 denotes a rear bumper. In addition, a back door 112 is attached between the upper portion of the rear bumper 111 and the side outer panel 110.

  Reference numeral 113 denotes a rear wheel house. A rear fender lining 10 described later is attached to the inner surface of the rear wheel house 113. A rear wheel 114 is arranged in the rear wheel house 113.

  The vehicle 100 includes a rear over fender 115. The rear over fender 115 may be attached to the side outer panel 110, but may be formed integrally.

  Further, in order to make the appearance design suitable for providing the rear over fender 115, the side portion 111A that wraps around the vehicle body side portion of the rear bumper 111 is formed in a continuous shape that matches the shape of the rear over fender 115. Thus, a part of the outer shape of the rear wheel house 113 is formed. As described above, the vehicle according to the present embodiment forms a general body appearance by a plurality of panels, doors, bumpers, fenders, and the like.

  Now, attachment of the rear bumper 111 will be described with reference to FIGS. In FIG. 5, reference numeral 10 denotes a rear fender lining, which is attached to the inner surface of the rear wheel house 113 to prevent the inner surface of the vehicle body from being exposed, and to prevent stepping stones and water from the rear wheel 114 from entering the vehicle body. Reference numeral 1 denotes a bracket which is used when the rear bumper 111 is attached to the vehicle body. The rear bumper 111 has a flange portion 111a that is bent and extends inward in the vehicle width direction at the vehicle width direction side end of the end portion 111A. A mounting hole 111b is provided in the flange portion 111a. The bracket 1 and the bumper 111 are fastened using the mounting hole 111b.

  Here, the perspective view which looked at the bracket 1 from the front and back is shown in FIG. For the sake of convenience, arrows Fr and Rr indicating the front and rear of the vehicle in the mounting direction of the bracket 1 at the time of mounting are shown in the drawing.

  In FIG. 6, a bracket 1 is a substantially thin box-shaped bracket in which a step is generated between a bumper side seating surface 1A on the vehicle front side (Fr) and a vehicle body side seating surface 1B (see FIG. 7) on the vehicle rear side (Rr). It has a main body 1a. The bracket body 1a is provided with a nut portion 2 on the bumper side seating surface 1A side, and on the rear surface of the vehicle body side seating surface 1B that has stepped down from the vehicle front side (Fr) of the nut portion 2 to the vehicle rear side (Rr). A mounting hole 3 is provided. Further, pins 4 are formed near both sides of the nut portion 2 on the vehicle front side (Fr).

  Next, in FIG. 7, the engaging portion 5 projects from the vehicle body side seating surface 1 </ b> B to the vehicle rear side (Rr). The engaging portion 5 is composed of two pieces of claw pieces, and is provided so as to face and oppose at the vehicle rear side (Rr) periphery of the vehicle body side mounting hole 3. The claw piece of the engaging portion 5 is formed so as to be gradually reduced or reduced in diameter relative to the inner diameter of the vehicle body side mounting hole 3. Further, the claw piece of the engaging portion 5 is formed to be tapered at the tip portion.

  Further, the bracket body 1a has a flange shape 6 as a reinforcing member in order to ensure rigidity with respect to a shape in which a step is generated between the bumper side seating surface 1A and the vehicle body side seating surface 1B. Further, the entire periphery of the bracket body 1a is chamfered into an R shape.

  As described above, the rear bumper 111 is fastened to the bracket 1 using the mounting hole 111b of the flange portion 111a that extends inward in the vehicle width direction at the end in the vehicle width direction of the end portion 111A. Specifically, the bumper side seating surface 1A of the bracket 1 is aligned with the vehicle rear side of the flange portion 111a, the mounting hole 111b and the nut portion 2 are overlapped, and a screw is inserted through the mounting hole 111b and screwed.

  In the present embodiment, the rear bumper 111 and the bracket 1 are joined and assembled, and the rear bumper 111 is mounted on the flange portion 111a by overcoming the side outer panel 110 and the like from the vehicle rear side while slightly widening the rear bumper 111 in the width direction. The bracket 1 is guided so as to enter the rear wheel house 113. In this case, the bracket 1 protrudes inward in the vehicle width direction. However, since the bracket 1 is made of resin and further has the above-mentioned R shape, even if it interferes with the vehicle body, the vehicle body can be painted. There is little risk of injury.

  Here, FIG. 8 shows a state in which the rear bumper 111 gets over the side outer panel 110. In addition, this figure is a figure which shows a mode that it looked at from the vehicle front to back and a little upwards in the rear wheel house 113, and the screw used for fastening and the rear fender lining 10 are shown for convenience. Not.

  In FIG. 8, an engagement hole 111 c is provided in the flange portion 111 a of the rear bumper 111. Positioning is achieved by engaging the pin 4 of the bracket 1 with the engagement hole 111c, and even if only one screw is used, it has the effect of preventing rotation, and it is not necessary to use a plurality of screws, so the number of parts is reduced. In addition, the assemblability can be improved and the appearance can be improved. Hereafter, the state of the AA cross section in FIG. 8 is demonstrated using FIG.

  In FIG. 9A, a state in which the rear bumper 111 and the side outer panel 110 are fixed is shown in a cross-sectional view as viewed from above. The side outer panel 110 has a flange portion 110a extending inward in the vehicle width direction, and a fitting hole 110b is formed in the flange portion 110a. As described above, the rear bumper 111 is moved over the side outer panel 110 and the like from the rear side of the vehicle to guide the bracket 1 attached to the flange portion 111a into the rear wheel house 113, and then the vehicle body side seat of the bracket 1 is mounted. While engaging the surface 1B with the flange portion 110a, the engaging portion 5 is engaged and temporarily held in the fitting hole 110b. Since the temporary holding state can be obtained in this way, the mounting operation is facilitated. Further, since the engaging portion 5 turns around from the main body of the rear bumper 111 and protrudes toward the main body of the rear bumper 111, the temporary holding rigidity is improved, the engagement is ensured, and the temporary holding state is hardly removed.

  Then, the rear fender lining 10 is overlapped with the bracket 1 from the front side of the vehicle, and a screw is inserted into the through hole 10a provided at a predetermined position of the rear fender lining 10 and the vehicle body side mounting hole 3, and screwed to the engaging portion 5. And fastening together with the side outer panel 110 is completed.

  Further, as described above, the engaging portion 5 is composed of two claw pieces that gradually decrease or reduce in diameter with respect to the inner diameter of the vehicle body side mounting hole 3. That is, the inner width of the two claw pieces of the engaging portion 5 is smaller than the inner diameter of the vehicle body side mounting hole 3 than the diameter of the screw to be inserted, and the screw is formed without cutting the female screw because it is formed of resin. Can serve as a nut. Furthermore, by closing the screw, the claw piece of the engaging portion 5 is expanded, so that it expands in the width direction and is firmly fixed to the fitting hole 110b, thereby reducing the number of parts and processing steps. Moreover, since the front-end | tip of the engaging part 5 is formed in the taper, when making it fit in the fitting hole 110b, it can fit easily and workability | operativity can be improved.

Further, as shown in the drawing, a groove 116 is provided on the outer side in the vehicle width direction of the rear bumper 111 of the flange portion 111a to prevent the occurrence of sink marks peculiar to molding. Moreover, the bracket 1 is attached to the vehicle rear side of the flange part 111a of the rear bumper 111, so that the bracket 1 is not exposed to the outer surface and the design can be improved.

  In FIG. 9 (b), the rear bumper, which is narrower in the vehicle width direction than in the present embodiment, is overlapped with the flange portion 110a of the side outer panel 110, and the fender lining is directly attached using the fitting hole 110b. It is a figure which shows the example of attachment of a vehicle.

  FIG. 9C is a view showing a state in which the bumper mounting structure of the present embodiment is compared with that of a vehicle without an overfender. By using the bracket 1 as shown in the drawing, a vehicle without an over fender uses a fitting hole 110b that is used to directly fix a rear bumper that is narrower in the vehicle width direction than in the present embodiment. 111 can be easily attached. Furthermore, since the bracket 1 is molded from resin, the degree of freedom in shape is improved, and it is possible to respond flexibly to design changes compared to metal brackets such as sheet metal.

  In addition, the bumper is usually made of a relatively soft resin assuming that the rear and the front will collide. However, in the bumper mounting structure of the present invention, the bracket 1 can be handled as a separate part. It can be made of a hard resin different from the material of the bumper, and can secure sufficient rigidity against screw tightening and vibration, particularly at the time of mounting, thereby improving the merchantability.

  Further, the bumper mounting structure of the present invention is not limited to the mounting of the rear bumper, and can be suitably applied to a front bumper.

  Further, in the present embodiment, the engaging portion 5 is composed of two pieces of claw pieces, but the number thereof is not limited and can be suitably implemented even if constituted by three pieces or more of claw pieces. It is.

1 is a side view of a vehicle according to an embodiment of the present invention. 1 is a plan view of a vehicle according to an embodiment of the present invention. 1 is a front view of a vehicle according to an embodiment of the present invention. 1 is a rear view of a vehicle according to an embodiment of the present invention. It is the figure which looked at the state before the bumper attachment of the vehicle which concerns on embodiment of this invention. It is a perspective view of the component in the bumper attachment structure of this invention. It is a perspective view of the component in the bumper attachment structure of this invention. It is a figure which shows the principal part of the vehicle which concerns on embodiment of this invention. It is a figure for demonstrating the bumper attachment structure of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bracket 1A Bumper side seat surface 1B Car body side seat surface 1a Bracket main body 2 Nut part 3 Car body side attachment hole 4 Pin 5 Engagement part 6 Flange shape 10 Rear fender lining 10a Through hole 100 Vehicle 110 Side outer panel 110a Flange part 110b Fitting Hole 111 Rear bumper 111a Flange 111b Mounting hole 111c Engagement hole 113 Rear wheel house 115 Rear over fender

Claims (4)

A part of the outer shape of the wheel house is formed by the end of the bumper that wraps around the side of the vehicle body, and an over fender is attached along the shape of the wheel house on the outer side in the vehicle width direction of the outer panel that becomes the design surface of the vehicle A vehicle bumper mounting structure,
A flange portion extending inward in the vehicle width direction in the wheel house is provided at an end portion of the bumper, a resin bracket is attached to the vehicle rear side of the flange portion, and the bumper is attached to the vehicle body via the bracket. A bumper mounting structure for a vehicle characterized by that.   The outer panel has a flange portion that extends inward in the vehicle width direction in the wheel house, a fitting hole is provided in the flange portion of the outer panel, and the outer panel protrudes from the periphery of the mounting hole on the vehicle body side of the bracket. The bumper mounting structure for a vehicle according to claim 1, wherein a joint portion is engaged with the fitting hole.   The engaging portion is constituted by a claw piece projecting and arranged opposite to the periphery of the vehicle body side mounting hole, and the inner width or inner diameter of the claw piece is gradually reduced or reduced with respect to the inner diameter of the vehicle body side mounting hole. The vehicle bumper mounting structure according to claim 2, wherein the vehicle bumper mounting structure is formed as described above.   A lining constituting the inner surface of the wheel house is disposed in the wheel house, the lining is overlapped with the mounting hole on the vehicle body side of the bracket, and the bracket and the lining are fastened together with a screw for expanding the claw piece. The bumper mounting structure for a vehicle according to claim 3.

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