JP2022040980A - Engine undercover attachment structure - Google Patents

Abstract

To provide an engine undercover attachment structure making it possible to readily attach an engine undercover to a vehicle body.SOLUTION: An engine undercover 20 includes an intermediate stay 36 that is attached to a vehicle rear end part of the engine undercover 20. Fixation points P1, P1 of the intermediate stay 36 and the engine undercover 20 are arranged outside in a vehicle width direction of fixation points P2, P2 of an attachment bracket 26 and the intermediate stay 36. The intermediate stay 36 is arranged between the attachment bracket 26 and the engine undercover 20.SELECTED DRAWING: Figure 6

Description

INDUSTRIAL APPLICABILITY The present invention is an engine undercover that is detachably fixed to a mounting bracket extending toward the front of the vehicle at the front part of the suspension cross member arranged along the vehicle width direction in the front part of the vehicle body in the vehicle front-rear direction. Regarding the mounting structure.

For example, Patent Document 1 discloses a floor undercover that covers the lower surface of a fuel tank and is made of a synthetic resin material. A metal body is laminated and fixed on the upper surface of the floor undercover.

The floor undercover and the metal body are directly fixed to the vehicle body without using the undercover mounting bracket.

Japanese Patent No. 4276206

By the way, the engine undercover covering the lower surface of the engine is detachably fixed to the undercover mounting bracket extending from the suspension cross member (front subframe) toward the front of the vehicle. This undercover mounting bracket is configured to be horizontally long along the vehicle width direction in order to secure mounting strength and mounting rigidity, and the undercover mounting point is also extended along the vehicle width direction.

Therefore, it may be difficult to attach the engine undercover due to the relationship with the arrangement position of the engine drain. In addition, the engine mounting jig and the undercover mounting bracket may overlap in the vehicle width direction, making it difficult to mount the engine undercover.

The present invention has been made in view of the above points, and an object of the present invention is to provide an engine undercover mounting structure capable of easily mounting an engine undercover to a vehicle body.

In order to achieve the above object, the present invention attaches and detaches to a mounting bracket extending toward the front of the vehicle at the front end of the suspension cross member arranged along the vehicle width direction in the front of the vehicle body. It is a mounting structure of an engine undercover that is freely fixed, and the engine undercover includes an intermediate stay that is attached to the rear end of the vehicle of the engine undercover, and is a fixing point between the intermediate stay and the engine undercover. Is arranged outside the vehicle width direction from the fixing point between the mounting bracket and the intermediate stay in the vehicle width direction, and the intermediate stay is arranged between the mounting bracket and the engine undercover. It is characterized by.

In the present invention, it is possible to obtain an engine undercover mounting structure that allows the engine undercover to be easily mounted on the vehicle body.

It is a schematic perspective structure view of the front part of the vehicle body to which the engine undercover mounting structure which concerns on embodiment of this invention is applied. It is an enlarged perspective view which shows the state which removed the front side frame, the upper frame, the front bulkhead and the like from the state shown in FIG. It is an exploded perspective view of FIG. It is an enlarged perspective view which shows the cover body of an engine under cover. It is an enlarged perspective view which shows the intermediate stay. It is a perspective view which shows the state which the intermediate stay and the mounting bracket are fastened and fixed by the bolt which inserts a bolt insertion hole. It is a partially omitted perspective view showing a state in which an intermediate stay is fastened and fixed to a cover main body via a rivet. (A) is a partially enlarged perspective view of FIG. 2, (b) is a vertical sectional view along the line AA of (a), and (c) is a vertical section along the line BB of (a). It is a top view.

Next, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate.
In each figure, "front and rear" indicates the vehicle front-rear direction, "left and right" indicates the vehicle width direction (horizontal direction), and "up and down" indicates the vehicle vertical direction (vertical vertical direction).

As shown in FIG. 1, the vehicle body front portion 10 includes a pair of left and right front side frames 12, 12, a pair of left and right upper frames 14, 14, and a front bulkhead 16 which has a rectangular shape when viewed from the front. .. Further, as shown in FIG. 1 or 2, the vehicle body front portion 10 includes an engine undercover 20, a front subframe 22, and a front subframe arranged below the vehicle body front portion 10 via a support member 18. It is configured to include an engine E supported by 22.

As shown in FIG. 1, the pair of left and right front side frames 12, 12 are arranged on both the left and right sides along the vehicle width direction, and extend along the vehicle front-rear direction. The vehicle front end of each front side frame 12 is connected to the front bulkhead 16. Further, the vehicle rear end portion of each front side frame 12 is connected to the front end portion 23 including the dashboard.

The front subframe 22 has a suspension cross member 24 located at the front end of the front subframe 22 and extending along the vehicle width direction (see FIG. 2). A mounting bracket 26 extending toward the front of the vehicle is provided at substantially the center of the front end of the suspension cross member 24.

As shown in FIG. 3, the support member 18 extends along the vehicle width direction and is fastened to the front bulkhead 16 at both ends of the front cross member 28 and the front cross member 28 along the vehicle width direction. A pair of left and right rear extension portions 30, 30 extending toward the rear of the vehicle, and each rear extension portion 30 projecting upward from the rear end of the vehicle and connected to each front side frame 12. It has a pair of left and right upward protrusions 32, 32.

The engine undercover 20 includes a cover main body 34 having a rectangular shape in a plan view, and an intermediate stay 36 fixed to the upper surface of the rear end of the cover main body 34.

As shown in FIG. 4, the cover main body 34 is fastened and fixed to the support member 18 via a plurality of fastening and fixing portions. The plurality of fastening fixing portions include a front fixing portion 38a provided at the front end of the vehicle of the cover main body 34, and a pair of left and right side fixing portions 38b and 38b provided at both ends of the cover main body 34 in the vehicle width direction, respectively. It is composed of.

Further, on the rear side of the vehicle of the cover main body 34, a plurality of rivet insertion holes 40 separated by predetermined intervals along the vehicle width direction are arranged. In the intermediate stay 36, a plurality of rivet insertion holes 42 are arranged at positions corresponding to the rivet insertion holes 40 of the cover main body 34. The engine undercover 20 (cover body 34) and the intermediate stay 36 are fastened to each other via the rivet insertion hole 40 of the cover body 34 and the rivet 44 (see FIG. 7) penetrating the rivet insertion hole 42 of the intermediate stay 36, respectively. It is fixed (see FIG. 8 (c)). In other words, since the mounting bracket 26 is not fastened and fixed by the rivet 44 (see FIG. 8C), the mounting bracket 26 and the engine undercover 20 (cover body 34) interfere with each other in the vehicle width direction. It can be suppressed.

Each rivet insertion hole 40 of the cover main body 34, each rivet insertion hole 42 of the intermediate stay 36, and each rivet 44 function as "fixing points between the intermediate stay and the engine undercover", respectively. Of the plurality of fixed points between the intermediate stay 36 and the engine undercover 20, the fixed points P1 and P1 located on the outermost side in the vehicle width direction are the fixed points P2 between the mounting bracket 26 and the intermediate stay 36 in the vehicle width direction. It is arranged outside the vehicle width direction from P2 (see FIG. 6). In the present embodiment, four fixed points of the intermediate stay 36 and the engine undercover 20 are arranged along the vehicle width direction, but the present invention is not limited to this.

As shown in FIG. 4, a pair of mounting holes 46 are further arranged at the rear end of the vehicle of the cover main body 34. The mounting hole 46 is for the bolt 48 that fastens the intermediate stay 36 and the mounting bracket 26 to pass through from below (see FIG. 8B). Further, the mounting hole 46 is provided with a surrounding rib 50 that surrounds the mounting hole 46 in a U-shape in a plan view. In the surrounding rib 50, the U-shaped opening is located at the rear of the vehicle.

The minimum inner diameter of the mounting hole 46 is larger than the maximum outer diameter of the head of the bolt 48 that fastens the intermediate stay 36 and the mounting bracket 26 (see FIG. 8B). As a result, both the intermediate stay 36 and the mounting bracket 26 are fastened and fixed by the bolt 48, and the intermediate stay 36, the mounting bracket 26, and the engine under cover 20 are integrally fastened and fixed. It is not something that will be done.

As shown in FIG. 5, the intermediate stay 36 is composed of a long plate body extending along the vehicle width direction. The intermediate stay 36 is provided with an upward flange 52 extending upward at the vehicle front end of the intermediate stay 36. The upward flange 52 is continuously provided from one end in the vehicle width direction to the other end in the vehicle width direction of the intermediate stay 36.

Further, on the front side of the vehicle of the intermediate stay 36, a plurality of rivet insertion holes 42 (for example, four in the present embodiment) are arranged so as to be separated by a predetermined interval along the vehicle width direction. Each rivet insertion hole 42 is arranged at a position close to the upward flange 52 of the intermediate stay 36.

Further, on the rear side of the vehicle of the intermediate stay 36, a pair of bolt insertion holes 54 to be fastened by bolts 48 (see FIG. 6) that have passed through the mounting holes 46 of the engine undercover 20 are arranged. Each bolt insertion hole 54 is located between the intermediate stay 36 and the adjacent fixing point of the engine undercover 20 in the vehicle width direction.

Furthermore, the intermediate stay 36 is arranged between the mounting bracket 26 located on the upper side and the engine undercover 20 located on the lower side in the vertical direction of the vehicle, and is indirectly sandwiched by both of them.

The mounting bracket 26 is joined to the central portion of the suspension cross member 24 of the front subframe 22 along the vehicle width direction and to the vehicle front end portion of the suspension cross member 24 (see FIG. 2). The mounting bracket 26 is provided so as to extend (project) from the front end edge of the suspension cross member 24 to the front of the vehicle. A pair of projecting portions 56, 56 projecting toward the engine undercover 20 side are provided at both ends of the mounting bracket 26 in the vehicle width direction. Each protruding portion 56 is provided with a bolt insertion hole 58 fastened by a bolt 48 penetrating the bolt insertion hole 54 of the intermediate stay 36.

The bolt insertion hole 54 of the intermediate stay 36, the bolt insertion hole 58 of the mounting bracket 26, and the bolt 48 function as "fixing points between the mounting bracket and the intermediate stay".

In the intermediate stay 36, the number of rivet insertion holes 42 (4 in this embodiment) is larger than the number of bolt insertion holes 54 (2 in this embodiment). Each bolt insertion hole 54 is located between adjacent rivet insertion holes 42 in the vehicle width direction (see FIG. 5).

The vehicle body front portion 10 to which the engine undercover mounting structure according to the embodiment of the present invention according to the present embodiment is applied is basically configured as described above, and the effects thereof will be described below.

In the present embodiment, of the plurality of fixed points between the intermediate stay 36 and the engine undercover 20, the fixed points P1 and P1 located on the outermost side in the vehicle width direction are the mounting bracket 26 and the intermediate stay 36 in the vehicle width direction. It is arranged outside the fixed points P2 and P2 in the vehicle width direction (see FIG. 6). Further, the intermediate stay 36 is arranged between the mounting bracket 26 located on the upper side and the engine undercover 20 located on the lower side in the vertical direction of the vehicle.

In the present embodiment, even if the mounting bracket 26 is set shorter in the vehicle width direction as compared with the conventional case, the intermediate stay 36 is indirectly sandwiched between the mounting bracket 26 and the engine undercover 20, so that the engine is used. The undercover 20 can be firmly fixed. In other words, since the engine undercover 20 is attached to the mounting bracket 26 via the intermediate stay 36, the engine undercover 20 can be firmly fixed. The intermediate stay 36 can firmly fix the engine undercover 20 further outside the vehicle width direction than the mounting bracket 26. Therefore, in the present embodiment, the engine undercover 20 can be detachably fixed while ensuring the mounting rigidity and mounting strength of the engine undercover 20.

Further, in the present embodiment, the mounting bracket 26 (separation interval between the pair of bolt insertion holes 58, 58) is set short in the vehicle width direction, so that the positional relationship with the engine drain, the engine mounting jig and the mounting bracket 26 are set. It is possible to preferably avoid the fact that the and the above are superimposed in the vertical direction of the vehicle. As a result, in the present embodiment, it is possible to obtain an engine undercover mounting structure that allows the engine undercover 20 to be easily mounted on the vehicle body.

Further, in the present embodiment, the intermediate stay 36 has an upward flange 52 extending upward toward the vehicle front end of the intermediate stay 36, and the upward flange 52 is from one end of the intermediate stay 36 in the vehicle width direction. It is continuously provided up to the other end in the vehicle width direction.

In the present embodiment, since the intermediate stay 36 is provided with an upward flange 52 at the front end of the vehicle, the suspension cross member is used when the intermediate stay 36 and the mounting bracket 26 are fastened and fixed while reinforcing the rigidity and strength of the intermediate stay 36 itself. It is possible to avoid contact with the 24 and improve the assembling property. Further, in the present embodiment, since the upward flange 52 is continuously provided from one end in the vehicle width direction to the other end in the vehicle width direction, the intermediate stay 36 and the engine undercover 20 arranged close to the upward flange 52 are fixed. It is possible to reinforce the rigidity and strength of points, which are places where a load is likely to be applied.

Further, in the present embodiment, the intermediate stay 36 and the mounting bracket 26 are fastened by bolts 48. The engine undercover 20 is provided with a mounting hole 46 for the bolt 48 to pass through.

In the present embodiment, the bolt 48 can be configured so that the engine undercover 20, the intermediate stay 36, and the mounting bracket 26 are not fastened at the same time. As a result, the engine undercover 20 does not locally receive the tensile load originally received by the bolt fastening points (fixed points P2, P2) due to the shaking of the vehicle body during traveling, so that the bolt fastening points are not received locally. It is possible to suppress the breakage of the engine undercover 20 in. In addition, "shaking during running" includes, for example, shaking due to water hammer when flooded during running.

Furthermore, in the present embodiment, the mounting hole 46 has a surrounding rib 50 that surrounds the mounting hole 46. In the present embodiment, by providing the surrounding rib 50 that surrounds the mounting hole 46, the engine undercover 20 can reinforce the decrease in strength of the engine undercover 20 that may occur due to the provision of the mounting hole 46.

Furthermore, in the present embodiment, the engine undercover 20 and the intermediate stay 36 are fastened by rivets 44. The intermediate stay 36 has a rivet insertion hole 42 through which the rivet 44 is inserted. The "fixing point between the intermediate stay and the engine undercover" includes the rivet insertion hole 42. Furthermore, in the present embodiment, the intermediate stay 36 and the mounting bracket 26 are fastened by bolts 48. The intermediate stay 36 has a bolt insertion hole 54 through which the bolt 48 is inserted. The "fixing point between the mounting bracket and the intermediate stay" is configured to include the bolt insertion hole 54.

Furthermore, in this embodiment, the number of rivet insertion holes 42 is larger than the number of bolt insertion holes 54. Each bolt insertion hole 54 is located between adjacent rivet insertion holes 42 in the vehicle width direction.

Thereby, in the present embodiment, the tensile load transmitted from the mounting bracket 26 side due to the shaking of the vehicle body during traveling can be received at a plurality of fixed points, and the local load is applied to the engine undercover 20. It is possible to avoid being input. As a result, in the present embodiment, the breakage of the engine undercover 20 can be suitably suppressed.

10 Body front 20 Engine undercover 24 Suspension cross member 26 Mounting bracket 36 Intermediate stay 42 Rivet insertion hole 44 Rivet 46 Mounting hole 48 Bolt 50 Surrounding rib 52 Upward flange 54 Bolt insertion hole P1 Fixed point between intermediate stay and engine undercover Fixing point between P2 mounting bracket and intermediate stay

Claims (8)

It is a mounting structure of the engine undercover that is detachably fixed to the mounting bracket that extends toward the front of the vehicle at the front end of the suspension cross member arranged along the vehicle width direction at the front of the vehicle body. hand,
The engine undercover comprises an intermediate stay attached to the vehicle rear end of the engine undercover.
The fixing point between the intermediate stay and the engine undercover is arranged outside the vehicle width direction from the fixing point between the mounting bracket and the intermediate stay in the vehicle width direction.
The engine undercover mounting structure is characterized in that the intermediate stay is arranged between the mounting bracket and the engine undercover. In the engine undercover mounting structure according to claim 1,
The intermediate stay has an upward flange extending upward to the vehicle front end of the intermediate stay.
The upward flange is an engine undercover mounting structure characterized in that the intermediate stay is continuously provided from one end in the vehicle width direction to the other end in the vehicle width direction of the intermediate stay. In the engine undercover mounting structure according to claim 1 or 2.
The engine undercover mounting structure is characterized in that the intermediate stay and the mounting bracket are fastened with bolts, and the engine undercover is provided with mounting holes for the bolts to pass through. In the engine undercover mounting structure according to claim 3,
The mounting hole is an engine undercover mounting structure characterized by having a surrounding rib that surrounds the mounting hole. In the engine undercover mounting structure according to claim 1,
The engine undercover and the intermediate stay are fastened by rivets, the intermediate stay has a rivet insertion hole through which the rivet is inserted, and the fixing point between the intermediate stay and the engine undercover is the rivet. Engine undercover mounting structure characterized by including rivets. In the engine undercover mounting structure according to claim 1,
The intermediate stay and the mounting bracket are fastened by bolts, the intermediate stay has a bolt insertion hole through which the bolt is inserted, and the fixing point between the mounting bracket and the intermediate stay is the bolt insertion hole. The engine undercover mounting structure is characterized by including. In the engine undercover mounting structure according to claim 1,
The engine undercover and the intermediate stay are fastened by rivets, the intermediate stay has a rivet insertion hole through which the rivet is inserted, and the fixed point between the intermediate stay and the engine undercover is the rivet. Including rivets
The intermediate stay and the mounting bracket are fastened by bolts, the intermediate stay has a bolt insertion hole through which the bolt is inserted, and the fixing point between the mounting bracket and the intermediate stay is the bolt insertion hole. The engine undercover mounting structure is characterized by including. In the engine undercover mounting structure according to claim 7,
The number of rivet insertion holes is larger than the number of bolt insertion holes.
An engine undercover mounting structure, wherein each bolt insertion hole is located between adjacent rivet insertion holes in the vehicle width direction.

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