JP2007283884A - Substructure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a substructure of a vehicle which supports a parking brake cable arranged in an anteroposterior direction between a fuel tank and a bracket, and protects the fuel tank located in the vicinity of a front end of a trailing arm below a floor panel equipped with the bracket located on both the sides of its undersurface for supporting the front end of the trailing arm extending in an anteroposterior direction of a rear suspension via a bolt extending in a body widthwise direction. <P>SOLUTION: The parking brake cable 71a is supported by the vertical face part 31c of the bracket 30 on the side of the fuel tank via a cable mounting bracket 84 fixed on the vertical face part 31c. The cable mounting bracket 84 is disposed so as to cover a bolt 41 as viewed from the side of the fuel tank 60. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lower structure of an automobile and belongs to the technical field of a vehicle body structure.

  At the bottom of the automobile, for example, a floor panel and a tray that is attached to the lower left and right sides of the floor panel and supports the front end of a trailing arm that extends substantially front and rear of the rear suspension device via bolts that extend in the vehicle width direction. A ring arm support bracket may be provided.

  In addition, as disclosed in, for example, Patent Document 1, a fuel tank is disposed in a space between the left and right trailing arms at the lower portion of the automobile, and between the fuel tank and the trailing arm. Parking brake cable may be arranged in the space.

JP-A-6-92121

  By the way, the fuel tank capacity is preferably as large as possible, but in order to achieve this, it is necessary to enlarge the fuel tank as much as possible in the vehicle longitudinal direction and the vehicle width direction, for example. However, in this case, the tip of the bolt that supports the front end of the trailing arm is close to the fuel tank, and when a side collision occurs, the tip of the bolt is displaced toward the fuel tank and the tank There is a risk of contact.

  Further, Patent Document 1 does not disclose how to support the parking brake cable in the space between the fuel tank and the trailing arm.

  Therefore, an object of the present invention is to provide a lower structure of an automobile that can support a parking brake cable and protect a fuel tank.

  In order to solve the above-described problems, the present invention is configured as follows.

  First, the invention according to claim 1 of the present application includes a floor panel and bolts that are attached to the left and right sides of the bottom surface of the floor panel and extend in the vehicle width direction at the front end of a trailing arm that extends substantially front and rear of the rear suspension device. A trailing arm support bracket that supports the fuel tank, and a fuel tank that is provided near the front end of the trailing arm below the floor panel, and between the fuel tank and the bracket. And a parking brake cable routed through the space in the front-rear direction, wherein the parking brake cable is disposed on the fuel tank side surface of the trailing arm support bracket. Supported by a cable mounting bracket attached to the cable With bracket is characterized in that is provided so as to cover the bolt when viewed from the fuel tank side.

  According to a second aspect of the present invention, in the lower structure of the automobile according to the first aspect, the cable mounting bracket is a support member that supports the parking brake cable and a cover member that is mounted on the trailing arm support bracket. The cover member is provided so as to cover the bolt, and the cover member is formed of a plate material thinner than the support member.

  According to a third aspect of the present invention, in the automobile lower structure according to the second aspect, a support member of the cable mounting bracket is provided so as to cover the bolt.

  Furthermore, in the invention according to claim 4, in the lower structure of the automobile according to claim 2 or claim 3, the cover member and the support member of the cable mounting bracket each have a substantially horizontal surface portion, Both horizontal surface portions are fixed by mounting bolts.

  According to a fifth aspect of the present invention, in the automobile lower structure according to any of the second to fourth aspects, the support member of the cable mounting bracket is wound around the outer periphery of the parking brake cable. It has a winding part for holding the cable, and the tip of the winding part faces the anti-fuel tank side.

  Next, the effect of the present invention will be described.

  According to the first aspect of the invention, the parking brake cable is supported on the fuel tank side surface of the trailing arm support bracket via the cable mounting bracket attached to the surface, and Since the cable mounting bracket is provided so as to cover the bolt when viewed from the fuel tank side, the parking brake cable can be supported by the bracket with one member of the cable mounting bracket, and at the time of a side collision, etc. Can be prevented from coming into direct contact with the fuel tank.

  By the way, in order to support the parking cable, the cable mounting bracket needs to have sufficient rigidity. However, if a portion covering the bolt is provided, the weight of the bracket increases.

  However, according to the invention described in claim 2, the cable mounting bracket includes a cover member attached to the trailing arm support bracket, and a support member that supports the parking brake cable. Since the cover member is provided so as to cover the bolt, and the cover member is formed of a plate material thinner than the support member, the weight of the cable mounting bracket is reduced while ensuring the support rigidity of the parking brake. be able to.

  According to the invention described in claim 3, since the support member of the cable mounting bracket is provided so as to cover the bolt, the fuel tank can be protected not only by the cover member of the bracket but also by the support member. It becomes.

  Furthermore, according to the invention described in claim 4, since the cover member and the support member of the cable mounting bracket each have a substantially horizontal surface portion, both horizontal surface portions are fixed by mounting bolts, The axial center direction of the bolt for attaching the support member to the cover member is substantially perpendicular to the fuel tank direction. Therefore, even if a side collision occurs, the bolt is prevented from coming into contact with the fuel tank.

  According to the invention of claim 5, the support member of the cable mounting bracket has a winding portion that is wound around the outer periphery of the parking brake cable and holds the cable, and the tip of the winding portion is bent. Since it faces the fuel tank side, contact between the tip of the winding portion and the fuel tank can be prevented.

  Hereinafter, a lower structure of an automobile according to an embodiment of the present invention will be described.

  FIG. 1 is a top perspective view of the lower part of the automobile 1 according to the present embodiment (interior parts and the like are omitted). As shown in this figure, the lower part of the automobile 1 constitutes a floor surface. The floor panel 2 includes side sills 3 and 3 extending in the front-rear direction along left and right side edges of the floor panel 2.

  A tunnel portion 2b extending in the front-rear direction and bulging upward from the reference surface 2a is provided in the center of the floor panel 2 in the vehicle width direction. As shown in FIGS. 2 and 3, the rear surface of the tunnel portion 2 b in the floor panel 2 has a vertical surface portion 2 c that rises substantially upward, and a plane that extends rearward substantially horizontally rearward from the upper end of the vertical surface portion 2 c. A portion 2d is formed and constitutes the bottom surface of the rear seat and the cargo floor. The floor panel 2 includes a plurality of panels such as a front rear panel, a rear floor panel, and a side floor panel that joins the side sills 3 and 3 to each other. In the present embodiment, these are distinguished. Without being described as the floor panel 2. On the upper surface of the floor panel 2, a plurality of cross members 4, 4, 5, and 5 extending in the vehicle width direction are provided between the side sills 3 and 3 and the tunnel portion 2b.

  As shown in FIG. 2, the lower surface of the floor panel 2 is provided with left and right floor frames 6 and 6 that extend in the front-rear direction inside the left and right side sills 3 and 3 and on the rear side of the vertical surface portion 2c. Yes. The floor frames 6 and 6 have an inverted hat shape in cross section, and form a closed cross section space X1 between the floor frames 2 (see FIG. 5). The front portions of the floor frames 6 and 6 are joined to the side sills 3 and 3.

  On the lower surface of the horizontal surface portion 2e of the floor panel 2, a cross-member 7 having a cross-section with an inverted cross-section for connecting the left and right floor frames 6 and 6 is provided, and the cross-member 7 and the floor panel 2 form a closed cross-section space X2. (See FIG. 3).

  In addition, rear wheel houses 10 and 10 in which rear wheels (not shown) are accommodated are provided on the left and right sides of the flat portion 2 d of the floor panel 2, and the left and right rear wheels are suspended in the wheel houses 10 and 10. Rear suspension devices 20 and 20 are provided, respectively.

  The rear suspension device 20 (symmetrical, only one of which will be described) is supported by a trailing arm support bracket 30, which will be described later, provided below the floor frame 6 so as to be swingable. Is connected to the rear wheel via a wheel support (not shown), a torsion bar 22 having a reverse U-shaped cross section connecting the left and right trailing arms 21, 21, and the outer surface of the trailing arm 21. The plate-like spring lower end receiving member 23 joined to the inner side portion of the frame, the vertical surface portion 24a joined to the outer vertical surface portion 6c of the floor frame 6 above the spring lower end receiving member 23, and the vertical surface portion An L-shaped spring upper end receiving member 24 having a horizontal surface portion 24b extending inwardly from the lower end of 24a inward, and both receiving members 23, 2 Between the coil spring 25 interposed therebetween, the support member 26 joined to the rear end portion of the spring lower end receiving member 23, and the upper end portion of the wheel house 10, and can be expanded and contracted in the vertical direction. When the vertical movement of the vehicle body occurs, the trailing arm 21 swings about the front end portion, and the vertical displacement on the rear end side due to the swinging is caused by the damper member 27 and the coil spring. 25 absorbs by expanding and contracting. Here, since the left and right trailing arms 21 and 21 are connected by the torsion bar 22, they will behave in a similar manner. The torsion bar 21 can be twisted during this interlocking.

  A member 28 having a U-shaped section is joined to the left and right ends of the inner surface of the torsion bar 22 so as to form a closed section with the torsion bar 22, and the outer end of the member 28 is joined to the trailing arm 21. ing. That is, when the joint between the torsion bar 22 and the trailing arm 21 is reinforced, and when the peeling force acts on the joint between the torsion bar 22 and the trailing arm 21 due to the twist of the torsion bar 22. This peeling force can be shared.

  The trailing arm support bracket 30 includes a pair of left and right first and second members 31 and 32 as shown in FIGS. The first member 31 includes a vertical surface portion 31 a joined to the vertical surface portion 6 a inside the floor frame 6, and a lateral surface portion 31 b that extends outward from the lower end of the vertical surface portion 31 a and is joined to the horizontal surface portion 6 b of the floor frame 6. And a vertical surface portion 31c extending downward from the tip of the horizontal surface portion 31b. The second member 32 has a vertical surface portion 32 a that is joined to the vertical surface portion 6 c on the outer side of the floor frame 6 and faces the vertical surface portion 31 c of the first member 31. A reinforcing plate 33 that reinforces the vertical surface portion 31c is joined to the vertical surface portion 31c constituting the surface of the first member 31 on the fuel tank 60 side.

  Between the front portions of the left and right vertical surface portions 31c, 32a of the first and second members 31, 32, the vertical surface portions 31c, 32a are bridged and reinforced, and the vertical surface portions 31c, 32a fall in the vehicle width direction. A reinforcing member 35 is provided to prevent this. The reinforcing member 35 is fixed to the flange portion provided at the lower ends of the first and second members 31 and 32 and the lateral surface portion 6 b of the floor frame 6 by bolts and nuts.

  A support mechanism 40 for incorporating the trailing arm 21 between the left and right vertical walls 31c and 32a of the trailing arm support bracket 30 is built in the front end portion of the trailing arm 21. That is, the support mechanism 40 penetrates the left and right vertical surface portions 31c and 32a, the reinforcing plate 33, the side sill inner panel 51, and the wheel house inner panel 52 of the trailing arm support bracket 30 in the substantially vehicle width direction so as to swing. A bolt 41 and a nut 42 that constitute a core and lock the support mechanism 40 between the vertical surface portions 31c and 32a, an inner cylinder 43 inserted through the bolt 41, a rubber member 44 surrounding the inner cylinder 43, and An outer cylinder 45 provided on the outer periphery of the rubber member 44, and a hole 46a formed at the front end portion of the body member 46 of the trailing arm 21 and opened in a substantially vehicle width direction in which the outer cylinder 45 is fitted. Have.

  The vertical portion 32a on the outer side in the vehicle width direction of the trailing arm support bracket 30, the side sill inner panel 51, and the peripheral portion of the portion where the bolt 41 is inserted in the wheel house inner panel 52 are joined together. Further, the nut 42 is not joined to any member, and the head has a hole in the mounting bracket 47 in which the front and rear end portions are joined to the reinforcing plate 33 of the vertical surface portion 31 c inside the trailing arm support bracket 30. It is inserted into 47a.

  Here, a fuel tank 60 for storing fuel is fixed to the lower surface of the flat portion 2 d of the floor panel 2 via a band 61. Note that no cross member is provided below the kick-up portion where the horizontal surface portion 2d and the vertical surface portion 2c of the floor panel 2 are connected, and the front end portion of the fuel tank 60 is as close as possible to the vertical surface portion 2c. This increases the fuel tank capacity.

  In addition, a parking brake lever that can swing back and forth is provided above the front portion of the tunnel portion 2b of the floor panel 2, and the swing of the lever is transmitted to the braking devices for the left and right rear wheels. A parking brake cable 71 for operating the braking device extends rearward above the tunnel portion 2b, passes through a grommet 72 attached near the rear end of the tunnel portion 2b, penetrates from the upper surface side to the lower surface side, and branches Branching left and right via a member 73. The branched cables 71a and 71a extend rearward in the tunnel portion 2b, bend left and right in the direction away from each other in the vicinity of the front surface of the fuel tank 60, and then substantially follow the outer periphery of the fuel tank 60. It extends to the braking device.

  Here, the parking brake cable 71a (one of the left and right will be described. The other is bilaterally symmetric with this) is arranged on the lower surface side of the floor panel 2 in order from the lever side. It is attached to the first member 31 of the floor frame 6 and the trailing arm support bracket 30 through the cable attachment brackets 81, 82, 83, and 84 in the vicinity of the upper end of the vertical surface portion 2 c. Among these, the brackets 81, 82, and 83 are clip-type ones.

  In contrast, the cable mounting bracket 84 fixed to the first member 31 of the trailing arm support bracket 30 includes a cover member 91 fixed to the vertical surface portion 31c of the first member 31 and the reinforcing member 35, and a parking brake cable 71a. And a support member 92 for supporting the.

  The cover member 91 is located on the axial center of the bolt 41 of the support mechanism 40, is substantially parallel to the vertical surface portion 31c of the first member 31 of the trailing arm support bracket 30, and is a side view from the fuel tank 60 side. A main body 91a provided to cover the tip of the bolt 41, first and second legs 91b, 91c extending from the front and rear ends of the upper end of the main body 91a toward the vertical surface 31c of the first member 31, A third leg portion 91d extending substantially horizontally from the lower end of the main body portion 91a toward the vertical surface portion 31c, and a flange portion formed at the tip of each leg portion 91b, 91c, 91d and joined to the reinforcing member 35 or the vertical surface portion 31c 91e, 91f, 91g.

  The support member 92 is formed using a plate-shaped material thicker than the cover member 91 (the cover member 91 is formed using a plate-shaped material thinner than the support member 92), and the third leg of the cover member 91 is formed. A base portion 92a fixed to the lower surface of the portion 91d by mounting bolts 93 and nuts 94, and a winding portion 92b extending upward from the tip of the base portion 92a and wound around the outer periphery of the parking brake cable 71a to hold the cable 71a. Have. The tip 92c of the cable holding portion 92b faces the anti-fuel tank side 60. The cable holding portion 92b is located on the axial center of the bolt 41 and is provided so as to cover the tip of the bolt 41 in a side view from the fuel tank 60 side.

  Next, the effect of the lower structure of the automobile according to the present embodiment will be described.

  First, the parking brake cable 71a is supported on the surface of the trailing arm support bracket 30 on the fuel tank 60 side via a cable mounting bracket 84, and the cable mounting bracket 84 is viewed from the fuel tank 60 side. Since it is provided so as to cover the bolt 41, the parking brake cable 71a can be supported by the trailing arm support bracket 30 with a single member of the cable mounting bracket 84, and at the time of a side collision or the like, It is possible to prevent the tip from coming into direct contact with the fuel tank 60.

  The cable mounting bracket 84 includes a cover member 91 attached to the trailing arm support bracket 30 and a support member 92 that supports the parking brake cable 71a, and the cover member 91 is the bolt 41. Since the cover member 91 is formed of a plate material thinner than the support member 92, the cable mounting bracket 84 can be reduced in weight while ensuring the support rigidity of the parking brake 71a. Can do.

  Since the support member 92 of the cable mounting bracket 84 is provided so as to cover the bolt 41, the fuel tank 60 can also be protected by the support member 92.

  Further, the cover member 91 and the support member 92 of the cable mounting bracket 84 have substantially horizontal surface portions 91d and 92a, respectively, and both horizontal surface portions 91d and 92a are fixed by bolts 93 and nuts 94, respectively. The axial direction of the bolt 93 is substantially perpendicular to the direction of the fuel tank 60. Therefore, even if a side collision or the like occurs, the bolt 93 is prevented from coming into contact with the fuel tank 60.

  The support member 92 of the cable mounting bracket 84 has a winding portion 92b that is wound around the outer periphery of the parking brake cable 71a and holds the cable 71a, and the leading end 92c of the winding portion 92b faces the anti-fuel tank 60 side. Since it faces, contact with the tip of winding part 92b and fuel tank 60 can be prevented.

  The present invention can be widely applied to the substructure of an automobile.

1 is a top perspective view of a lower part of an automobile according to an embodiment of the present invention (a state in which interior parts are omitted). It is a rear left side bottom view of this motor vehicle. It is AA sectional drawing of FIG. FIG. 4 is an enlarged view of a trailing arm support bracket portion in FIG. 3. It is BB sectional drawing of FIG.

Explanation of symbols

1 Car 2 Floor Panel 6 Floor Frame 10 Rear Suspension 21 Trailing Arm 30 Trailing Arm Support Bracket 31c Vertical Surface (Fuel Tank Side Surface in Trailing Arm Support Bracket)
32a Vertical surface portion 41 Bolt (Bolt for supporting the trailing end of the trailing arm on the trailing arm support bracket)
42 Nut 60 Fuel tank 71a, 71a Parking brake cable 84 Cable mounting bracket (cable mounting bracket attached to the trailing arm support bracket)
91 Cover member 91d Third leg (substantially horizontal surface portion of the cover member)
92 Support member 92a Base (substantially horizontal surface portion of the support member)
92b Winding portion 93 mounting bolt (mounting bolt for fixing substantially horizontal surface portions of the cover member and the support member)
94 Mounting nut

Claims (5)

There are provided a floor panel and a trailing arm support bracket which is attached to the left and right sides of the lower surface of the floor panel and supports the front end of the trailing arm extending substantially front and rear of the rear suspension device via a bolt extending in the vehicle width direction. And a fuel tank provided in the vicinity of the front end of the trailing arm below the floor panel, and a parking routed through the space between the fuel tank and the bracket in the front-rear direction. A substructure of an automobile provided with a brake cable,
The parking brake cable is supported on the fuel tank side surface of the trailing arm support bracket via a cable mounting bracket attached to the surface,
The lower structure of an automobile, wherein the cable mounting bracket is provided so as to cover the bolt as viewed from the fuel tank side. In the lower structure of the automobile according to claim 1,
The cable mounting bracket is composed of a cover member attached to the trailing arm support bracket and a support member that supports the parking brake cable.
And the cover member is provided so as to cover the bolt,
A lower structure of an automobile, wherein the cover member is formed of a plate material thinner than the support member. In the lower structure of the automobile according to claim 2,
A lower structure of an automobile, wherein a support member of the cable mounting bracket is provided so as to cover the bolt. In the lower structure of the automobile according to claim 2 or 3,
Each of the cover member and the support member of the cable mounting bracket has a substantially horizontal surface portion,
A lower structure of an automobile, characterized in that both horizontal surface portions are fixed by mounting bolts. In the lower structure of the automobile according to any one of claims 2 to 4,
The support member of the cable mounting bracket has a winding portion that is wound around the outer periphery of the parking brake cable and holds the cable.
A lower structure of an automobile, wherein a tip of the winding portion faces the anti-fuel tank side.

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