CN102470813A - Bumper mounting structure - Google Patents

Abstract

A bumper mounting structure, wherein a bumper is prevented from being detached from a vehicle body during travel of a vehicle and the bumper can be removed from the vehicle body when necessary. A bumper mounting structure is provided with a fixing section (11) fixed to a vehicle body, an outer surface (15) located on the inner surface side of a bumper (30), and an upper surface having an engaging claw (20A). The engaging claw (20A) comprises a claw section (25) provided to the tip of an elastic section (24) extended toward the bumper (30), and the claw section (25) projects obliquely upward toward the vehicle body. The bumper (30) is provided with a cover section (31) for covering a predetermined portion of the vehicle body, a flange section (32) extending to the rear surface side of the cover section (31) along the upper side of the cover section (31), and a mounting hole (33A) formed in the flange section (32). When the engaging claw (20A) is engaged with the mounting hole (33A), an engaging surface (25a) of the claw section (25) of the engaging claw (20A) makes contact with the inner periphery of the mounting hole (33A) at a position separated from an inner corner (C) of the engaging surface (35).

Description

bumper mounting structure

technical field

The invention relates to a mounting structure for fixing to a bumper of a motor vehicle body via a bracket.

Background technique

In automobiles, bumpers are attached to the front and rear of the vehicle body via brackets.

For example, Patent Document 1 discloses a bumper fixing device that is placed between the bumper and the vehicle body so as to mount the bumper to the vehicle body so that the ends in the extending direction of the bumper constitute the ends of the wheel wells (wheel housings). part.

In the bumper fixing device 1, as shown in FIG. In a state where the bumper fixing device 1 is fixed to the vehicle body 5 via a mounting portion not shown, the claw portion 2a of the bumper fixing device 1 is engaged with the mounting hole 4a of the flange portion 4 of the bumper 3, thereby, The bumper 3 is attached to the vehicle body 5 via the bumper fixing device 1 . In this case, the claw portion 2 a of the bumper fixing device 1 abuts on the inner corner portion C of the inner periphery of the mounting hole 4 a in the bumper 3 .

prior art literature

patent documents

Patent Document 1: JP-2007-125977-A

Contents of the invention

The problem to be solved by the invention

For example, unpredictable forces may act on the bumper 3 in the direction indicated by arrow A in FIG. 6 . When such a force is applied to the inner surface of the bumper 3, the claw portion 2a may be pressed by the inner periphery of the mounting hole 4a, and the engaging piece 2 may be twisted downward, as shown by phantom lines in FIG. In this case, since the claw portion 2a abuts against the inner corner portion C of the inner circumference of the mounting hole 4a, the elastic force of the engaging piece 2 twisted downward is applied to the inner corner portion C; therefore, as shown by arrow B in FIG. , a force that pushes up the flange portion 4 obliquely upward may be applied, and also, during the running of the vehicle, the claw portion 2a may be separated from the mounting hole 4a, which may cause the bumper 3 to be separated from the vehicle body 5 .

An object of the present invention is to provide a bumper mounting structure capable of reliably preventing the bumper from being separated from the vehicle body during running of the vehicle.

problem solution

The present invention provides a bumper mounting structure for mounting a bumper to a vehicle body via a bracket, wherein the bracket includes: a fixing portion fixed to the vehicle body; an outer surface disposed close to an inner surface of the bumper; and an upper A surface having engaging claws, wherein the bumper includes: a shielding portion for shielding a given area of a vehicle body; a flange portion extending rearward from an upper side of the shielding portion; and a mounting hole formed in the flange portion , wherein the engaging claw includes an engaging surface for engaging with an engaging surface of the mounting hole, which is a portion of the inner peripheral surface of the mounting hole that is close to the end of the flange portion, and wherein, when the engaging When the claw is engaged with the mounting hole, the engaging surface of the engaging claw abuts the engaging surface of the mounting hole at a position away from an inner corner portion of the mounting hole engaging surface.

The engagement claw may include an elastic piece extending toward the bumper, and a claw protruding obliquely upward from an end of the elastic piece toward the vehicle body.

Inwardly protruding protrusions may be formed at inner corners of the mounting hole engagement surface.

The protrusion may be a burr formed on the inner peripheral surface of the mounting hole when the mounting hole is formed.

The bumper flange portion and the bracket may be positioned adjacent to the motor vehicle fender portion.

Invention effect

According to the present invention, after the bracket is fixed to the vehicle body via the fixing portion, the inner surface of the bumper is arranged along the outer surface of the bracket, and the claw portion of the bracket engaging claw is engaged with the mounting hole of the flange portion in the bumper, thereby, via The bracket mounts the bumper to the body.

Here, the engaging surface of the engaging claw in the bracket abuts the engaging surface of the inner peripheral surface of the mounting hole at a position away from the inner corner portion of the engaging surface of the inner peripheral surface of the mounting hole. Since the engaging surface of the engaging claw does not abut the inner corner of the mounting hole, even when a force acts on the inner side of the bumper to apply a pull-off force thereto, no upward thrust is applied to the bumper flange, thus avoiding engagement. The claws are separated from the mounting holes.

Description of drawings

Fig. 1 shows an axonometric view of an embodiment of a bumper mounting structure according to the present invention;

Fig. 2 is an axonometric illustration of the installation structure viewed from the position opposite to that of Fig. 1;

Figure 3 shows the main parts of the installation structure in an enlarged manner;

Figure 4A to Figure 4C illustrate the main part of the installation structure in an enlarged manner, Figure 4A illustrates how to make the bumper break away from the state shown in Figure 3 when the bumper is pulled with a strong force, Figure 4B illustrates how to use a stronger force to pull the bumper from the state shown in Figure 4A How to make the bumper disengage when the force pulls the bumper, how to make the bumper disengage when pulling the bumper with a stronger force from the state shown in Figure 4B as shown in Fig. 4C;

Figure 5 is an axonometric illustration of the area where this installation structure is applied; and

Figure 6 illustrates a conventional structure for mounting a bumper to a vehicle body.

Detailed ways

Next, an embodiment of a bumper mounting structure (mounting structure) according to the present invention will be described with reference to FIGS. 1 to 5 .

As shown in FIGS. 3 and 5 , this mounting structure includes a bumper 30 and a bracket 10 as essential components. Bumpers 30 are provided respectively at the front and rear of the vehicle body 5 via brackets 10 .

The bumper 30 includes: a shielding portion 31 for shielding a given area of the vehicle body 5 ; a flange portion 32 extending inwardly from an upper side of the shielding portion 31 ; and mounting holes 33A, 33B formed in the flange portion 32 , 33C and 33D.

As shown in FIG. 5 , the shielding portion 31 of the bumper 30 extends in the width direction of the vehicle body 5 , is bent longitudinally toward the vehicle body 5 at its end, and further extends toward the fenders 9 , 9 located on both sides of the vehicle body 5 . The bumper 30 is mounted to the vehicle body 5 via a lateral region of the shield portion 31 in the vicinity of the fender portion 9 . In FIG. 1 and FIG. 2 , for the convenience of expression and understanding, only the part of the shielding part 31 for mounting to the vehicle body 5 is illustrated, while the rest of the area is omitted.

As shown in FIG. 3 , the vehicle body 5 includes: a plate portion 6 with a fixing hole 6 a; a top wall 7 protruding forward from the upper end of the plate portion 6 ; and an outer wall 8 extending from the end of the top wall 7 . The bumper 30 is mounted to the recess defined by these components. The flange portion 32 extends backward from the upper side of the shielding portion 31 .

The flange portion 32 includes a plurality of mounting holes 33A, 33B, 33C, and 33D arranged at a given pitch. Each mounting hole 33A/ 33B/ 33C is a long hole extending along the direction in which the shielding portion 31 extends.

When the inner surface of the bumper 30 is arranged along the outer surface 15 of the bracket 10, the mounting holes 33A, 33B, and 33C aligned with the engaging claws 20A, 20B, and 20C of the bracket 10 are engaged therewith, respectively (see FIGS. 1 and 2 ). ). Screws not shown are inserted into the mounting holes 33D, thereby screwing and fixing the bumper 30 to the vehicle body 5 .

As shown in FIG. 3 , the part of the inner peripheral surface of the mounting hole 33A that is close to the panel portion 6 of the vehicle body 5 (close to the vehicle body 5 or close to the end of the flange portion 32) constitutes an engaging surface 35, so that the claw portion 25 of the engaging claw 20A and the claw portion 25 of the engaging claw 20A The joint surface 35 is jointed. The engaging surface 35 is substantially perpendicular to the lower surface of the flange portion 32 . The convex portion 36 is provided at the inner corner portion C of the joint surface 35 so as to protrude inwardly of the mounting hole 33A. In this embodiment, the convex portion 36 is formed as a burr when the mounting hole 33A is formed. A portion 37 of the inner peripheral surface of the mounting hole 33A positioned opposite to the engaging surface 35 constitutes a slope that is inclined such that the mounting hole 33A gradually decreases in diameter toward the lower surface of the flange portion 32 .

As shown in FIGS. 1 and 2 , in this embodiment, brackets 10 are provided at each bent end portion of the bumper 30 near the fender portion 9 , and the brackets 10 are formed to extend along the direction in which the bumper 30 extends. Thick long plate. Bracket 10 includes: fixing portions 11A, 11B fixed to vehicle body 5 ; outer surface 15 disposed close to the inner surface of bumper 30 ; and upper surface 17 having engagement claws 20A, 20B, and 20C.

The front side of the bracket 10 has a shape conforming to the shape of the bumper 30 (in this embodiment, a shape slightly convex forward and gently curved), and constitutes an outer surface 15 disposed adjacent to the inner surface of the bumper 30 . At the longitudinal ends of the outer surface 15, recesses 16, 16 each having a given depth are formed, and fixing portions 11A, 11B for fixing to the vehicle body 5 are rearward from the bottom 16a of the recesses 16, 16 (ie, toward the outer surface). 15) out (see Figure 2).

Each fixing portion 11A, 11B includes: a rectangular cylindrical insertion portion 12 for insertion into a fixing hole 6a formed in the vehicle body 5; to engage with the rear peripheral edge of the fixing hole 6a.

Engagement claws 20A, 20B and 20C are provided on the upper surface 17 of the bracket 10 corresponding to the mounting holes 33A, 33B and 33C of the bumper 30 , respectively. Engagement claws 20B and 20C for engaging with associated mounting holes 33B and 33C of the bumper 30 , respectively, are each formed deformable via a pair of slits extending from the inside of the upper surface 17 .

On the other hand, an engaging claw 20A is located at one end of the bracket 10 for engaging with a mounting hole 33A located near a corner portion of the bumper 30 , and has an outer shape as described below. That is, as shown in FIG. 1 , in the outer surface 15 of the bracket 10 , a recess 21 is formed in the vicinity of the mounting hole 33A. A portion of the upper surface 17 corresponding to the recess 21 constitutes an upper wall of the recess 21 . At the upper surface 17, a pair of slits 22 substantially parallel to each other are formed from the outer surface 15 (ie, from the outer side of the upper surface 17). Accordingly, a cantilever-shaped elastic piece 24 extending toward the bumper 30 is formed via the slit 22 .

The claw portion 25 protrudes obliquely upward from the end of the elastic piece 24 toward the vehicle body 5 . That is, the engagement claw 20A is formed by the elastic piece 24 and the claw portion 25 .

The end surface of the claw portion 25 that is closer to the vehicle body 5 constitutes an engaging surface 25 a for engaging with a portion of the inner peripheral surface of the mounting hole 33A that is closer to the end of the flange portion 32 . The joint surface 25 a is substantially perpendicular to the upper surface of the elastic piece 24 . Since the claw portion 25 protrudes obliquely upward from the end of the elastic piece 24 toward the vehicle body 5 , a gap 26 is provided inside the claw portion 25 . As a result, when engaging the engaging claw 20A with the mounting hole 33A, the engaging surface 25a of the claw portion 25 in the engaging claw 20A abuts the engaging surface 35 of the mounting hole 33A at a position away from the inner corner portion C of the engaging surface 35 of the mounting hole 33A .

Although the amount of deformation of the elastic piece 24 in the engagement claw 20A can be increased by making the gap 26 larger, the thickness and rigidity of the claw portion 25 can also be increased by making the gap 26 smaller. The thickness and rigidity can be appropriately determined according to the purpose of use.

The support ribs 22a, 22a protrude at the outer peripheral edges of the pair of slits 22, 22 defining the elastic piece 24 to support the flange portion 32 of the bumper 30 (see FIGS. 2 and 3).

A plurality of positioning protrusions 18 are formed at the upper surface 17 of the bracket 10 , and the protrusions 18 enter a plurality of grooves 38 formed in the flange portion 32 of the bumper 30 , thereby positioning the bumper 30 .

In the present embodiment, the engaging claw 20A formed on one end side of the bracket 10 serves as the engaging claw of the present invention; however, the other engaging claws 20B and 20C may each have a structure similar to the engaging claw 20A, and the number of engaging claws It can be set appropriately.

Next, the method of using the mounting structure according to the present invention and its operational effect will be described.

First, as shown in FIGS. 1 and 2, align the fixing portions 11A, 11B of the bracket 10 with the fixing holes 6a, 6a provided in the plate portion 6 of the vehicle body 5, and then push the bracket 10 toward the vehicle body 5 to In this way, the fixing claws 13 , 13 of the fixing portions 11A, 11B are engaged with the rear peripheral edge of the fixing hole 6 a, and the bracket 10 is fixed to the vehicle body 5 .

In this embodiment, when the bracket 10 is fixed to the vehicle body 5, the engagement claw 20A (the engagement claw of the present invention) is arranged closer to the corner portion of the vehicle body 5, and, compared with the engagement claw 20A, the other engagement claws 20B and The position of 20C is closer to the fender portion of the vehicle body 5 .

Next, the mounting holes 33A, 33B, and 33C of the bumper 30 are aligned with the engaging claws 20A, 20B, and 20C of the bracket 10, respectively, and the bumper 30 is pushed toward the bracket 10 so that the flange portion 32 of the bumper 30 is inserted into the vehicle body. 5 between the top wall 7 and the upper surface 17 of the bracket 10, so that the inner surface of the bumper 30 is arranged along the outer surface 15 of the bracket 10.

Then, the outer surface of the claw portion 25 in the engaging claw 20A is pressed against the flange portion 32, and the engaging claw 20A is twisted (bent) downward. After the claw portion 25 reaches the mounting hole 33A of the bumper 30, the engaging claw 20A is elastically restored, thereby engaging the engaging surface 25a of the claw portion 25 with the engaging surface 35 of the mounting hole 33A, and engaging the engaging claw 20A with the mounting hole 33A. . Similarly, the engagement claws 20B and 20C are also engaged with the other mounting holes 33B and 33C, respectively. In addition, the positioning protrusion 18 of the bracket 10 enters the groove 38 of the bumper 30 , thereby positioning the bracket 10 .

According to the present embodiment, in the engagement claw 20A, the claw portion 25 protrudes obliquely upward toward the vehicle body 5 from the tip of the elastic piece 24 (extending toward the bumper 31 ). As a result, when the bumper 30 is pushed toward the bracket 10 , the flange portion 32 abuts the grip portion 25 along the outer surface thereof, and allows the elastic piece 24 to deform smoothly. As a result, it is possible to keep the insertion resistance at the time of installing the bumper low, thereby improving operability.

In this way, the engaging claws 20A, 20B, and 20C of the bracket 10 are engaged with the mounting holes 33A, 33B, and 33C of the bumper 30, respectively, and the inner surface of the shield portion 31 of the bumper 30 is arranged along the outer surface 15 of the bracket 10. , and thus, the bumper 30 is mounted to the vehicle body 5 via the bracket 10 . The bumper 30 is fastened to the vehicle body 5 through the mounting hole 33D with unshown screws.

When the bumper 30 is fixed to the bracket 10 as described above and the engaging claw 20A is engaged with the mounting hole 33A so that at a position away from the inner corner C of the engaging surface 35 of the mounting hole 33A, the claw portion 25 of the engaging claw 20A is The engaging surface 25 a adjoins the engaging surface 35 of the mounting hole 33A, as shown in FIG. 3 .

Here, force may be applied to the inner surface of the bumper 30 . For example, when the vehicle is running, wind is introduced through the front opening of the vehicle body 5 in order to cool the radiator and the like, and the introduced wind strongly blows against the inner surface of the bumper 30 . Such a strong wind is particularly likely to be applied to the area of the bumper 30 near the corner portion of the vehicle body 5 where the engaging claw 20A of the bracket 10 is engaged with the mounting hole 33A of the bumper 30 .

For example, as shown in FIG. 4A, a strong tear-off force F may be applied to the bumper 30, so that the claw portion 25 of the engaging claw 20A is pressed against the engaging surface 35 of the mounting hole 33A, and the elastic piece 24 is slightly deformed (bent) downward. . In this case, the claw portion 25 is moved downward, thereby bringing the lower corner portion of the engaging surface 25 a into sliding contact with the engaging surface 35 of the mounting hole 33A. In the present invention, when the bumper 30 is mounted to the vehicle body 5 via the bracket 10 and is not subjected to wind, the joint surface 25a of the claw portion 25 is mounted adjacently at a position away from the inner corner C of the joint surface 35 of the mounting hole 33A. Engagement surface 35 of hole 33A (see FIG. 3 ). Even when the elastic piece 24 deforms slightly downward, the claw portion 25 does not abut the inner corner portion C immediately. Therefore, when only the joint surface 25 a of the claw portion 25 and the joint surface 35 of the mounting hole 33A are pressed against each other, no force is generated to push up the flange portion 32 of the bumper 30 . Therefore, separation of the engagement claw 20A from the mounting hole 33A can be avoided, and therefore, the bumper 30 is reliably held to the vehicle body 5 .

Even if a stronger wind blows against the inside of the bumper 30 to further deform the claw portion 25, and thus make its engaging surface 25a abut the inner corner C of the engaging surface 35 in the mounting hole 33A, as shown in FIG. is caught by the convex portion 36 formed at the inner corner portion C, and thus prevents the engagement surface 25 a from slipping beyond the inner corner portion C, thereby preventing the bumper 30 from coming off.

When removing the bumper 30 from the vehicle body 5 to carry out motor vehicle repairs, parts replacement, etc., the bumper 30 is forcibly pulled out of the vehicle body 5 from the state shown in Figure 4B by means of a stronger pull-off force; therefore, as shown in Figure 4C As shown, the engaging surface 25a of the claw portion 25 is allowed to protrude from the inner corner portion C of the mounting hole 33A, so that the claw portion 25 is separated from the mounting hole 33A, and the engaging claws 20B and 20C are also disengaged from the mounting holes 33B and 33C, thereby allowing The bumper 30 is separated from the vehicle body 5 .

In the present embodiment, the engagement claw 20A is formed such that the claw portion 25 protrudes obliquely upward toward the vehicle body 5 from the tip of the elastic piece 24 extending toward the bumper 31 . Therefore, as shown in FIG. 3 , in a state where the bumper 30 is mounted to the vehicle body 5 via the bracket 10 and no such force is applied, the joint can be made at a position away from the corner portion C in the joint surface 35 of the mounting hole 33A. The engaging surface 25a of the claw 25 reliably abuts on the engaging surface 35 of the mounting hole 33A. As a result, as shown in FIG. 4A , even if a strong tear-off force F is applied to the bumper 30 and the elastic piece 20A is deformed downward, it is easy to maintain the engaging claw at a position away from the inner corner portion C of the engaging surface 35 of the mounting hole 33A. Since the engagement surface 25a of the attachment hole 25 is adjacent to the attachment surface 35 of the attachment hole 33A, separation of the engagement claw 25 from the attachment hole 33A is more reliably prevented.

In the present embodiment, the convex portion 36 is provided by a burr formed at the inner peripheral surface of the mounting hole 33A when the mounting hole 33A is formed. Therefore, when the molded bumper 30 inevitably forms burrs, such burrs can be actively used as the protrusions 36 at the inner peripheral surface of the mounting hole 33A. Since it is not necessary to additionally form the convex portion 36, the production cost of the bumper 30 can be reduced. When the burr formed when forming the mounting hole 33A remains on the inner peripheral surface of the mounting hole 33A, if the engaging surface 25a of the engaging claw 20A abuts the inner corner portion C of the mounting hole 33A, the safety will be pulled toward the vehicle body 5 according to the thickness of the burr. 30, and forms a step between the outer surface of the outer wall 8 and the outer surface of the shielding portion 31 in the vehicle body 5, thus deteriorating the appearance. In this mounting structure, since the engaging surface 25a of the engaging claw 20A does not abut the inner corner portion C of the mounting hole 33A; therefore, even if the deburring process is not performed, the bumper 30 can be avoided from being pulled toward the vehicle body 5, and the vehicle body can be The outer surface of the outer wall 8 in 5 and the outer surface of the shielding portion 31 are kept on the same plane, so as to avoid deterioration of the appearance.

In the present embodiment, the flange portion 32 of the bumper 30 and the bracket 10 are disposed near the fender portions 9, 9 of the motor vehicle (see FIG. 5). Since the area of the bumper 30 near the fender portion 9 of the vehicle is fixed to the vehicle body 5 via the bracket 10, during the running of the vehicle, even the air blown from the front of the vehicle to cool the radiator and the like then becomes fluid and strongly blows on both sides. The inner surface of the bumper 30 can be completely blown, and the bumper 30 can still be firmly held without making it sway.

Explanation of reference signs

10 bracket

11A, 11B fixed parts

15 External surface

17 upper surface

20A engagement claw

24 Elastic sheet

25 claws

25a Joint surface

30 bumper

31 Covering part

32 Flange

33A Mounting hole

35 joint surface

36 convex part

C inner corner

Claims (5)

1. fender-guard mounting structure is used for via support bumper mounting to vehicle body,

Wherein, said support comprises:

Fixed part, itself and said vehicle body are fixed;

Outside face, its inside face that is close to said bumper/spoiler is arranged; And

Upper surface, it has engaging claw,

Wherein, said bumper/spoiler comprises:

Shielding portion, it is used to cover the given area of said vehicle body;

Flange part, its upside from said shielding portion extends back; And

Mounting hole, it is formed at said flange part,

Wherein, said engaging claw comprises face of joint, is used for engaging with said mounting hole face of joint, is close to the part of the end of said flange part in the inner peripheral surface that said mounting hole face of joint is said mounting hole, and

Wherein, when said engaging claw was engaged with said mounting hole, in the position away from the interior corner part of said mounting hole face of joint, said engaging claw face of joint was in abutting connection with said mounting hole face of joint.

2. fender-guard mounting structure according to claim 1,

Wherein, said engaging claw comprises the flexure strip that extends towards said bumper/spoiler and the claw that stretches out obliquely towards said vehicle body from the end of said flexure strip.

3. according to claim 1 or the described fender-guard mounting structure of claim 2,

Wherein, be formed at the interior corner part of said mounting hole face of joint to projecting inward protuberance.

4. fender-guard mounting structure according to claim 3,

Be formed at the burr of said mounting hole inner peripheral surface when wherein, said protuberance is the said mounting hole of moulding.

5. according to the described fender-guard mounting structure of each claim in claim 1 to the claim 4,

Wherein, the said flange part of said bumper/spoiler and said support are arranged to be positioned near the fender guard portion of self-propelled vehicle.

Images