JP6092830B2 - Body bottom structure - Google Patents

Description

  The present invention relates to a vehicle body bottom portion structure provided with an under cover that covers a lower portion of an engine room.

  Known as the bottom structure of the car body is that the under cover that covers the lower part of the engine room is foldable via a hinge part, and the cover piece of the foldable under cover is detachably bolted to the car body (For example, refer to Patent Document 1).

  In this conventional vehicle body bottom structure, the bolts at the fastening portion of the cover piece are removed, and the cover piece is bent downward, so that maintenance work such as engine and transmission in the engine room can be easily and quickly performed from below the vehicle body. Can do.

International Publication No. 2012/043268

  However, in the conventional bottom structure of the vehicle body, there is only one foldable portion of the under cover. Therefore, when trying to widen the area that opens downward during maintenance work, the cover piece that can be bent downward increases in size. End up. For this reason, when the conventional vehicle body bottom part structure is employed, there is a concern that the folded cover piece itself may interfere with the work during the maintenance work.

  In addition, in the above conventional bottom structure of the vehicle body, there is only one place where the under cover can be bent, so there are multiple maintenance points in the engine room or when the specifications of the equipment in the engine room are different. There is a possibility that the opening portion by the bent piece may come off from an appropriate portion where maintenance is easy to perform.

  Therefore, the present invention is intended to provide a vehicle body bottom structure that can easily perform maintenance work in the engine room from below the vehicle body.

In the vehicle body bottom structure according to the present invention, in order to solve the above-described problem, a vehicle body on which an under cover (for example, the under cover 13 of the embodiment) that covers a lower portion of an engine room (for example, the engine room 3 of the embodiment) is installed. In the bottom structure, the under cover includes a center cover (for example, the center cover 13A of the embodiment) and a first edge cover (for example, the first cover of the embodiment) that is rotatably connected to one side of the center cover. Edge cover 13B) and a second edge cover (for example, the second edge cover 13C of the embodiment) that is rotatably connected to the other side of the central cover that is parallel to the one side. The first edge cover, the center cover, and the second edge cover are in an unfolded state in which the first edge cover, the center cover, and the second edge cover are arranged in this order. In this way, each is fixed to the vehicle body so as to be detachable.

Thereby, when performing maintenance of the engine, transmission, etc. in the engine room from the lower side of the vehicle body, the fastening portion of any of the first edge cover, the center cover, and the second edge cover, or any arbitrary The operation can be easily performed by removing the fastening portions of the two or more covers. Therefore, it is possible to flexibly cope with differences in maintenance locations and device specifications.
In addition, when this structure is used, the under cover can be folded at least in two places, so the parts of the individual under cover that can be folded downward become smaller, and the parts that are folded downward interfere with maintenance work. Hard to become. Furthermore, when this structure is adopted, it is fastened when maintenance work is performed by removing the fastening part of the two parts of the first edge cover and the center cover or the second edge cover and the center cover. Since the two parts removed from each other can be folded together, it is possible to avoid the two removed parts from interfering with the maintenance work.

At least one of the first edge cover and the second edge cover includes a side that is rotatably connected to the center cover (for example, one side 13C-f of the embodiment), and the one side farthest one vertex is located at a position (e.g., vertex @ 13 C-r embodiment) is formed in a polygonal shape having a, as the apex portion of the polygonal shape is detachably fastened to the vehicle body Also good.

  In this case, when the polygonal one of the first edge cover and the second edge cover is bent downward for maintenance work, only one of the fastening points of the polygonal apex portion is provided. Just remove it. For this reason, work efficiency can be improved by minimizing the removal of the fastening portion for maintenance.

  The under cover is arranged in the order of the first edge cover, the center cover, and the second edge cover from the front to the rear of the vehicle body, and the second cover and the center cover At least one of the first edge cover and the center cover is provided with an air inlet (for example, the air inlet 23 of the embodiment) for introducing air into the engine room from below the vehicle body. A bead (for example, the bead 16 of the embodiment) along the front-rear direction of the vehicle body may be formed on at least one of the front positions of the cover provided with the air guide opening.

  In this case, the bead formed on at least one of the first edge cover and the center cover rectifies the air flow on the lower surface of the vehicle body when the vehicle travels, and efficiently enters the engine room from the air duct on the rear side of the bead. Air can be introduced. In particular, in the case of this structure, the bead is formed in another cover on the front side of the cover where the air inlet is provided, and therefore it is easy to make the bead long and continuous in the longitudinal direction of the vehicle body. In addition, the rigidity of the undercover can be efficiently increased by the bead.

  According to the present invention, the under cover includes the first edge cover, the center cover, and the second edge cover that are rotatably connected, and the first edge cover and the center cover are provided during maintenance work. Since any of the fastening locations of the second edge cover or the fastening locations of any two or more covers can be removed, maintenance work in the engine room can be easily performed from below the vehicle body.

It is a bottom view of the rear part of the vehicle concerning one embodiment of this invention. It is a left view of the rear part of the vehicle which concerns on one Embodiment of this invention. 1 is a perspective view of a rear lower surface of a vehicle according to an embodiment of the present invention. It is a bottom view of an under cover and a brace concerning one embodiment of this invention. It is a bottom view of the rear part of the vehicle concerning one embodiment of this invention. It is a left view of the rear part of the vehicle which concerns on one Embodiment of this invention. It is a left view of the rear part of the vehicle which concerns on one Embodiment of this invention. It is a bottom view of the rear part of the vehicle concerning other embodiments of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the arrow FR indicates the front of the vehicle, the arrow UP indicates the upper side of the vehicle, and the arrow LH indicates the left side of the vehicle.

FIG. 1 is a view of the skeleton portion of the rear portion of the vehicle 1 according to this embodiment as viewed from below, and FIG. 2 is a view showing the left side surface of the rear portion of the vehicle 1.
The vehicle 1 according to this embodiment is a rear wheel drive vehicle in which the engine E is mounted on the rear part of the vehicle body and the rear wheels Wr are driven by the power of the engine E. An engine room 3 is disposed behind the passenger compartment of the vehicle 1, and the passenger compartment and the engine room 3 are partitioned by a rear partition wall (not shown). In the case of this embodiment, the engine E is integrated with an automatic transmission AT and is installed in the engine room 3 as a power unit PU. A resin fuel tank 5 for storing fuel to be supplied to the engine E is installed on the front side of the power unit PU in the engine room 3.

  Side sills 4 and 4 that are skeleton members along the longitudinal direction of the vehicle body are arranged below the left and right sides of the passenger compartment. A cross member (not shown) extending in the vehicle width direction is disposed between the rear edge portions of the left and right side sills 4, 4, and the left and right side sills 4 are connected to each other by the cross member. Further, a floor panel 9 constituting a lower wall of the vehicle body is laid between the lower surfaces of the left and right side sills 4 and 4. The rear end portion of the floor panel 9 is coupled to the lower edge of the rear partition wall that partitions the passenger compartment and the engine room 3.

  A pair of rear side frames 6, 6 extending from the cross member toward the rear side of the vehicle body (extending along the vehicle body front-rear direction) are arranged inward in the vehicle width direction of the rear edge portions of the left and right side sills 4, 4. Is arranged. Each of the left and right rear side frames 6 has a front end joined to the cross member, and an outer portion in the vehicle width direction of the front edge joined to the rear edge of the corresponding left and right side sills 4.

  The rear edge portions of the left and right rear side frames 6 and 6 are coupled to both ends of a rear subframe 8 that supports a part of the left and right suspension devices 7 and 7 on the rear side. The rear sub-frame 8 extends along the vehicle width direction, and the left and right end portions are fastened and fixed to the lower surface of the rear edge portion of the corresponding rear side frame 6. A fastening block 8a bulges downward and is provided in the center region in the vehicle width direction on the lower surface side of the rear sub-frame 8, and the space between the fastening block 8a and the rear edge portions of the left and right side sills 4 and 4 respectively. It is connected by braces 10L and 10R.

  The braces 10L and 10R are formed by flattening both edges of an oval pipe member, and the flattened edges are the lower surface of the fastening block 8a on the rear subframe 8 and the rear edge of the side sill 4. Bolts are fastened to the lower surface. In this embodiment, in the power unit PU, the engine E is disposed on the right side of the vehicle body in the engine room 3, and the transmission AT is disposed on the left side of the vehicle body in the engine room 3. The brace 10L disposed on the left side of the vehicle body extends from the rear subframe 8 to the left front side of the vehicle body obliquely across the lower side of the transmission AT below the engine room 3. On the other hand, the brace 10R disposed on the right side of the vehicle body extends obliquely across the lower side of the engine E from the rear subframe 8 to the right front side of the vehicle body below the engine room 3.

Further, the brace 10L disposed obliquely on the left side of the vehicle body is integrally attached with substantially arc-shaped fastening brackets 15f and 15r at a front edge near the front end and a front edge near the rear end.
Reference numeral 11 in FIG. 1 is a reinforcing brace that is stretched between the middle part of the rear side frame 6 and the cross member and reinforces the left and right rear side frames 6, 6. Reference numeral 12 denotes the left and right rear side frames 6. It is a load absorbing member that is connected to the rear end portion and absorbs the rear impact load.

FIG. 3 is a perspective view of the rear lower surface of the vehicle as viewed from the lower right side.
As shown in FIG. 3, an under cover 13 that covers the lower left portion of the fuel tank 5 and the lower portion of the transmission AT is disposed in the lower left portion of the engine room 3. A metal tank cover 14 is disposed between the rear portion of the fuel tank 5 and the power unit PU so as to separate the power unit PU and the resin fuel tank 5. The tank cover 14 is rigidly fixed to the vehicle body side by bolt fastening or the like, and functions to protect the fuel tank 5 from the heat of the power unit PU. The tank cover 14 is omitted for convenience of illustration in drawings other than FIG.

FIG. 4 is a view of the under cover 13 and the left brace 10L as viewed from below the vehicle body.
The under cover 13 includes a center cover 13A disposed substantially at the center in the front-rear direction, a first edge cover 13B disposed on the front side of the center cover 13A, and a second disposed on the rear side of the center cover 13A. Edge cover 13C.

The center cover 13A is formed in a substantially trapezoidal shape having two sides parallel to the front end portion and the rear end portion, and the one side 13A-f on the front side is pivotable to the first edge cover 13B on the front side. Are connected by The side 13A-r on the rear side of the central cover 13A is connected to the second edge cover 13C on the rear side by a hinge 20r so as to be rotatable. In the case of this embodiment, the center cover 13A, the first edge cover 13B, and the second edge cover 13C, including the hinges 20f and 20r, are entirely formed of resin.
The center cover 13A is longer in the front-rear direction than in the vehicle width direction, and has a front side 13A-f that is slightly shorter than the rear side 13A-r.

  In addition, a plurality of beads 16 (grooves recessed toward the upper side of the vehicle body) extending along the front-rear direction are formed side by side on the central cover 13A. Further, in the vicinity of the rear end portions of the left and right side edges of the central cover 13A, substantially semicircular fastening seats 17l and 17r are formed which are recessed toward the upper side of the vehicle body and are bolted to the vehicle body side. In addition, the code | symbol 19 in FIG. 4 is the inspection window formed in 13 A of center covers.

  The first edge cover 13B is formed in a substantially trapezoidal shape having two sides parallel to the front end and the rear end. The first edge cover 13B is longer in the vehicle width direction than the front-rear direction, and the front side one side 13B-f is slightly shorter than the rear side one side 13B-r. The side 13B-r on the rear side is formed to have the same length as the side 13A-f on the front side of the center cover 13A, and is connected to the side 13A-f on the front side by a hinge 20f. The left and right corner portions on the front side of the first edge cover 13B are formed with semi-circular fastening seats 18l and 18r that are recessed on the vehicle body upper side and bolted to the vehicle body side.

The second edge cover 13 </ b> C has a front side 13 </ b> C-f that is rotatably connected to a side 13 </ b> Ar on the rear side of the center cover 13 </ b> A by a hinge 20 r, and a rear end position that is separated from the side 13 </ b> C-f. It is formed in a triangular shape having vertices 13C-r arranged at. In the vicinity of the apex 13C-r portion on the rear end side of the second edge cover 13C, there is formed a fastening seat 21 that is recessed toward the vehicle body upper side and is bolted to the vehicle body side. The second edge cover 13C has an air guide groove 22 whose groove width gradually and gradually increases from the front end side toward the rear side, and an opening inside the engine room 3 at the rear end portion of the air guide groove 22. A horizontally long air duct 23 is formed. The air guide groove 22 is recessed toward the upper side of the vehicle body and guides air flowing below the vehicle body to the air guide port 23 when the vehicle is traveling.
Note that reference numeral 24 in FIG. 4 denotes a reinforcing bead formed on the second edge cover 13C.

  Here, as shown in FIG. 3, the central cover 13A is bolted so that the right fastening seat 17r can be detachably attached to the metal tank cover 14, and the left fastening seat 17l is the front portion of the left brace 10L. A bolt is detachably fastened to the side fastening bracket 15f. The first edge cover 13B on the front side is fastened with bolts so that the left and right fastening seats 18l and 18r are detachable from the rear edge of the floor panel 9 of the vehicle body. Further, the second edge cover 13C on the rear side is fastened with a bolt so that the fastening seat 21 at the apex 13C-r can be detachably attached to the fastening bracket 15r on the rear side of the left brace 10L.

5-7 is a figure which shows the example of removal of a part of under cover 13 in the case of replacing | exchanging the oil of transmission AT in the engine room 3, etc. FIG.
When removing a part of the under cover 13, for example, the bolts of the fastening portions of the second edge cover 13C and the center cover 13A with respect to the vehicle body are removed, and the second edge cover 13C and the center cover 13A are bent downward. The lower left side of the engine room 3 is opened. In addition, the code | symbol 40 in FIG. 5 is the drain hole for the oil drain of transmission AT.

  In the case of the example shown in FIG. 6, the second edge cover 13C is largely bent forward on the lower side centered on the rear hinge 20r, and the center cover 13A is lowered downward about the front hinge 20f. The rear end portion (vertex 13C-r portion) of the second edge cover 13C is brought into contact with the ground G by bending. In this way, the second edge cover 13C and the center cover 13A are bent downward, and the rear end of the second edge cover 13C is fixed in contact with the ground G. Various maintenance operations such as oil exchange can be performed.

  Further, in the example shown in FIG. 7, similarly to the example shown in FIG. 6, the second edge cover 13C and the center cover 13A are bent downward, and the rear end portion (the top portion) of the second edge cover 13C is folded. Part) is brought into contact with the ground G, and the bent portions of the second edge cover 13C and the central cover 13A are brought into contact with the oil recovery container B. In this case, the rear end portion of the second edge cover 13C is brought into contact with the ground, and the bent portions of the second edge cover 13C and the central cover 13A are brought into contact with the oil recovery container B. The bent state of the under cover 13 can be stably maintained.

  FIG. 8 is a diagram illustrating an embodiment in which a power unit PU in which a manual transmission MT is integrally attached to the engine E is employed. This embodiment is the same as the above embodiment except that it is a manual transmission MT, and the same under cover 13 is employed. In addition, the code | symbol 40A in FIG. 8 is the drain hole for oil draining of the manual transmission MT.

When the drain hole 40A of the transmission MT is disposed closer to the rear part of the vehicle body as in the transmission MT of this embodiment, for example, the bolt at the fastening portion of the second edge cover 13C with respect to the vehicle body is removed, and the second edge Maintenance work such as oil change of the transmission MT can be performed by bending only the part cover 13C downward.
In the example shown in FIG. 8, the bolt of the fastening portion of the second edge cover 13C with respect to the vehicle body is removed and the second edge cover 13C is bent downward, but depending on the maintenance site, The bolt of the fastening portion of the first edge cover 13B with respect to the vehicle body may be removed, and the first edge cover 13B may be bent downward. Further, depending on the maintenance site, the first edge cover 13B and the center cover 13A may be bent downward. Of course, it is also possible to remove the entire under cover 13 by removing the bolts of all the fastening portions.

  In the vehicle body bottom structure according to the embodiment described above, the under cover 13 covering the lower left portion of the engine room 3 is connected to the first edge cover 13B, the center cover 13A, and the second through the hinges 20f and 20r. The edge cover 13C of the first edge cover 13B, the center cover 13A, the second edge cover 13C, or any two or more covers can be fastened during maintenance work. The place can be selectively removed. Therefore, when performing maintenance of the engine E, transmission AT, MT, etc. in the engine room 3 from below the vehicle body, the first edge cover 13B, the center cover 13A, and the second edge cover 13C It is possible to remove a fastening portion of an arbitrary cover that is easy to work. Therefore, if this vehicle body bottom part structure is adopted, it is possible to flexibly cope with differences in maintenance parts and equipment specifications.

Moreover, in this vehicle body bottom part structure, since the under cover 13 can be bent in two places, the parts of each under cover 13 bent downward can be made small. For this reason, parts bent downward are unlikely to hinder maintenance work.
Furthermore, when removing the fastening part of the two parts of the first edge cover 13B and the central cover 13A or the second edge cover 13C and the central cover 13A to perform maintenance work, the fastening part was removed. Two parts can be folded together. For this reason, it can also be avoided that the two removed parts interfere with the maintenance work.
Therefore, when this vehicle body bottom structure is adopted, maintenance work in the engine room 3 can be easily performed from below the vehicle body.

  In this vehicle body bottom structure, the second edge cover 13C on the rear side is formed in a triangular shape having a side 13C-f and a vertex 13C-r that are rotatably connected to the center cover 13A, and the vertex 13C-r. The part is bolted so as to be detachable from the vehicle body. For this reason, when the second edge cover 13C is bent downward for maintenance work, it is only necessary to remove one fastening portion at the apex 13C-r portion. Therefore, when this structure is adopted, it is possible to improve the working efficiency by minimizing the removal of the fastening portion for maintenance.

Moreover, in this vehicle body bottom part structure, the 2nd edge cover 13C arrange | positioned at the rearmost part of the undercover 13 is provided with the air inlet 23 which introduces air in the engine room 3, and the 2nd edge cover A bead 16 is formed along the longitudinal direction of the vehicle body at a central cover 13A disposed at the front of 13C. For this reason, when the vehicle is traveling, the air flow on the lower surface of the vehicle body is rectified by the beads 16, and air can be efficiently taken into the engine room 3 through the air guide port 23 on the rear side. Further, since the bead 16 is formed on the central cover 13A different from the second edge cover 13C in which the air guide opening 23 is formed, the bead 16 is made long and continuous in the vehicle body front-rear direction and has a high rectifying effect. can do. Further, the bead 16 can increase the rigidity of the second edge cover 13C, particularly the rigidity in the longitudinal direction of the vehicle body.
The bead 16 may also be formed on the first edge cover 13B. Alternatively, the air inlet 23 may be formed in the central cover 13A and the bead 16 may be formed in the first edge cover 13B.

In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary. For example, in the above embodiment, the second edge cover on the rear side of the under cover is formed in a triangular shape, but the second edge cover is formed in a polygonal shape such as a pentagon or a triangle or more. The top portion that is separated from the hinged side may be fastened to the vehicle body so as to be detachable. In addition, instead of the second edge cover, or together with the second edge cover, the first edge cover can be formed in the same polygonal shape, and its top can be detachably fastened to the vehicle body side. It is.
Furthermore, in the above-described embodiment, the entire undercover is integrally formed of resin, but each part of the undercover can be formed of metal. In the above embodiment, the center cover of the under cover is formed by a single plate. However, the center cover may be configured by a plurality of plates that are foldably connected by a hinge.

DESCRIPTION OF SYMBOLS 3 ... Engine room 13 ... Under cover 13A ... Center cover 13B ... 1st edge cover 13C ... 2nd edge cover 13C-f ... One side 13Cr ... Vertex 16 ... Bead 23 ... Air guide port

Claims (3)

In the vehicle body bottom structure where the under cover that covers the lower part of the engine room is installed,
The under cover includes a center cover, a first edge cover rotatably connected to one side of the center cover, and a first edge cover rotatably connected to another side parallel to the one side of the center cover. Two edge covers,
The first edge cover, the center cover, and the second edge cover are respectively in a deployed state in which the first edge cover, the center cover, and the second edge cover are arranged in this order. underbody structure characterized in that it is detachably fastened to the vehicle body. At least one of the first edge cover and the second edge cover has one side rotatably connected to the center cover and one vertex arranged at a position farthest from the one side. underbody structure according to claim 1 which bets are formed in a polygonal shape having the apex portion of the polygonal shape is characterized in that it is detachably fastened to the vehicle body.   The under cover is arranged in the order of the first edge cover, the center cover, and the second edge cover from the front to the rear of the vehicle body, and the second cover and the center cover At least one of the first air outlet cover and the central cover is provided in front of the cover provided with the air inlet, at least one of the first edge cover and the central cover. The vehicle body bottom part structure according to claim 1 or 2, wherein a bead along the vehicle longitudinal direction is formed on at least one of the positions.

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