CN212827883U

CN212827883U - Filter tank mounting structure

Info

Publication number: CN212827883U
Application number: CN202021552030.0U
Authority: CN
Inventors: 芳贺丈延; 須内智之; 铃木翼
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2019-07-30
Filing date: 2020-07-30
Publication date: 2021-03-30
Anticipated expiration: 2030-07-30
Also published as: JP6903100B2; JP2021020650A

Abstract

The utility model provides a canister mounting structure, this canister mounting structure prevent that important parts such as canister and fuel tank collide when the collision to the overall arrangement degree of freedom is high. A bracket (10) for mounting a canister (8) has: a first member (11) extending in the front-rear direction between the important member (5) and the canister, and having a pair of panel attachment sections (15) attached to the lower surface of the floor (4) of the vehicle body (1); and at least one second member (12) having second body sections (21, 31) extending outward from the longitudinal middle section of the first member, vehicle body attachment sections (25, 35) attached to a component (2) of the vehicle body, and support sections (28, 32) for supporting the canister. The first member has higher bending rigidity against an input from the extending direction of the second body portion than the second member, and the second member is bent and deformed when a collision load is input from the vehicle exterior side.

Description

Filter tank mounting structure

Technical Field

The utility model relates to a filter tank mounting structure for being installed the filter tank on the automobile body via the bracket.

Background

There is known a canister mounting structure in which an important safety member such as a fuel tank is disposed in a space between a pair of side members, a canister is disposed in a side load input deformation region between a side member and the side member, and the canister is mounted to a vehicle body frame such as the side member or the side member via a fixing member so that the canister is detached by an impact at the time of inputting a side load to a vehicle (patent document 1). Thus, interference of the canister with important components such as the fuel tank can be prevented, and the degree of freedom in designing the base plate can be improved.

Further, a canister mounting structure is known in which a canister is disposed behind a cross member in a posture in which a front portion thereof is inclined downward and is mounted on the cross member via a canister mounting bracket having a downwardly convex curved shape (patent document 2). Thus, the mounting bracket is deformed with the bent portion as a starting point to absorb the impact and suppress interference between the canister and the fuel tank at the time of a rear-end collision of the vehicle.

Patent document 1: japanese patent laid-open publication No. 2006-200425

Patent document 2: japanese patent No. 5211659

SUMMERY OF THE UTILITY MODEL

However, in the conventional structure, the canister is attached to the vehicle body by a bracket having low rigidity and deformed by the collision load so as not to interfere with the fuel tank at the time of collision. The bracket is attached to a highly rigid vehicle body member (vehicle body frame) such as a side member, or a cross member. Therefore, the mounting position of the bracket is limited, and the degree of freedom of layout is low.

In view of the above background, an object of the present invention is to provide a canister mounting structure that prevents a canister from colliding with an important component such as a fuel tank at the time of collision and has a high degree of freedom in layout.

In order to solve the above problem, according to one embodiment of the present invention, there is provided a canister mounting structure for mounting a canister 8 to a position adjacent to a main member 5 mounted on a lower surface of a vehicle body 1 on an outer side (for example, a left side) of the vehicle via a bracket 10, the bracket including: a first member 11 extending along a lower surface (for example, a front-rear direction) of the vehicle body between the important member and the canister so as to be substantially perpendicular to a direction in which the important member and the canister face each other, and having a pair of panel attachment portions 15 attached to a lower surface of a floor 4 of the vehicle body; and at least one

second member

12, 12A, 12B having a

second body portion

21, 31 extending from a middle portion in a longitudinal direction of the first member to the vehicle outside, a vehicle

body attachment portion

25, 35 attached to a component member 2 of the vehicle body, and a

support portion

28, 32 supporting the canister, wherein the first member has higher bending rigidity against an input from the second body portion in an extending direction than the second member.

According to this configuration, the second member is more easily bent and deformed than the first member with respect to an input from the second body portion in the extending direction, and therefore, when the collision load is input from the vehicle exterior side, the collision load is less likely to be transmitted to the first member by the bending deformation of the second member. Therefore, the mounting positions of the first member and the second member of the bracket are not limited to the portions of the vehicle body where the rigidity is high, and the degree of freedom of layout is improved. Further, since the second member that is easily bent and deformed has the support portion for supporting the canister, the canister is displaced so as to be retracted from the adjacent position on the vehicle exterior side of the important member in accordance with the bending and deformation of the second member at the time of collision, and is not displaced further toward the important member side than the first member. Therefore, interference of the canister with important parts disposed adjacent to the vehicle interior side can be suppressed.

In the above configuration, the first member 11 preferably has a body portion 14 between the pair of panel mounting portions 15, and the body portion 14 is preferably formed in a closed cross-sectional shape defining a hollow portion therein.

According to this configuration, since the first member has the main body portion having the hollow closed cross-sectional shape, the bending rigidity of the first member can be improved with a small amount of material. Therefore, displacement of the canister to the important member side and weight increase of the bracket at the time of collision can be suppressed.

In the above configuration, it is preferable that the

second body portion

21, 31 of the second member 12 has a

weak portion

26, 36, 66 at a longitudinal intermediate portion, and the

weak portion

26, 36, 66 is bent in a direction protruding downward when an axial load is applied from the vehicle exterior side.

According to this configuration, the second member is deformed to project downward from the weak portion of the second body portion at the time of collision. Since the second member supports the canister, the canister is displaced downward in accordance with the deformation of the second member. Therefore, displacement of the canister to the important member side is suppressed, and interference of the canister with the important member arranged on the vehicle interior side of the first member is suppressed.

In the above configuration, it is preferable that the first member 11 has bending-inducing

portions

52 and 62 that induce bending in a direction bulging upward when receiving a compressive load in the axial direction at an intermediate portion in the longitudinal direction, at least one of the second members 12 includes two of the

second members

12A and 12B provided at different positions in the longitudinal direction of the first member so as to sandwich the bending-inducing portion, and the canister 8 is disposed across the

support portions

28 and 32 of the two second members.

According to this configuration, since the two second members are provided so as to sandwich the bending-inducing portion, when an axial compressive load acts on the first member, the joint portions of the two second members are displaced upward by the same degree. Therefore, when the first member is deformed by the axial compressive load, excessive downward displacement of the canister displaced downward by the deformation of the second member and displacement of the canister inclined with respect to the extending direction of the first member can be suppressed. This can effectively suppress contact between the canister and the ground.

In the above configuration, the

support portions

28 and 32 are preferably provided to protrude from the corresponding

second body portions

21 and 31 and are located between the two second body portions.

According to this configuration, since the canister attached to the support portion is disposed within the range surrounded by the second body portion, when the second body portion of the second member receives a collision load from the vehicle exterior side and deforms so that the fragile portion protrudes downward, the canister is displaced downward between the two second members. Therefore, the canister can be prevented from being sandwiched between the first member side portion of the second member and the vehicle exterior side portion. This can suppress breakage of the canister.

In the above configuration, it is preferable that at least one of the second members 12 is disposed so that the joining

portions

23, 33 joined to the first member 11 and the vehicle

body attachment portions

25, 35 are at substantially the same height as each other, and the canister 8 is disposed above the second member.

According to this configuration, when a collision load is applied from the vehicle exterior side, the second member deforms so as to protrude downward, and when the canister is displaced downward, the canister is sandwiched between the portion of the bracket on the first member side or the first member and the portion of the bracket on the vehicle exterior side or the component member of the vehicle body on the vehicle body side. Therefore, the canister is prevented from being displaced toward the vehicle interior side beyond the first member, from being excessively displaced downward, and from falling off.

In the above configuration, it is preferable that at least two fastening holes 39 arranged on the first member 11 side and the vehicle exterior side in the longitudinal direction of the second member are formed in the

support portions

28, 32 of at least one of the second members 12, and one of the fastening holes is a reference hole for positioning.

According to this configuration, when a load is applied to the canister at the time of collision, the canister transmits the load from the reference hole to the fragile portion of the second member without rattling, the second member can be effectively deformed, and the movement of the canister in the extending direction of the second body portion is suppressed, so that the canister does not displace more toward the important member side than the first member.

In the above structure, the important component is the fuel tank 5, the secondary battery for running, or the fuel cell.

With this configuration, it is possible to suppress damage to the fuel tank, the secondary battery for running, or the fuel cell due to interference of the canister at the time of collision.

Thus, according to the present invention, it is possible to provide a canister mounting structure that prevents a canister from colliding with an important component such as a fuel tank during a collision and has a high degree of freedom in layout.

Drawings

Fig. 1 is a bottom view of a main part of a vehicle body to which a canister mounting structure is applied.

Fig. 2 is a sectional view II-II in fig. 1.

Fig. 3 is a perspective view of the bracket shown in fig. 1 as viewed obliquely from above and from the front.

Fig. 4 is a side view of the first member shown in fig. 3.

Fig. 5 is a view in the direction of V in fig. 3.

Fig. 6A to 6E are explanatory views of deformation of the bracket and displacement of the canister at the time of a side collision.

Fig. 7 is a side view of a first member of a first modification.

Fig. 8A is a side view of the first member of the second modification, fig. 8B is a B-B sectional view of the first member of the second modification, and fig. 8C is a C-C sectional view of the first member of the second modification.

Fig. 9 is a bottom view of the second member of the third modification.

Description of the reference symbols

1: a vehicle body;

2: side members (constituent members);

4: a floor;

5: fuel tanks (important parts);

8: a filter tank;

10: a bracket;

11: a first member;

12: a second component;

12A: a front-side second member;

12B: a rear second member;

14: a first main body portion;

15: a panel mounting portion;

21: a front second body portion;

23: a front-side joining part;

25: a front side vehicle body mounting section;

26: a front side bent portion (fragile portion);

28: a front side support portion;

29: a fastening hole;

31: a rear second body portion;

32: a rear support portion;

33: a rear side joint part;

35: a rear side vehicle body mounting section;

36: a rear-side bent portion (fragile portion);

39: a fastening hole;

39A: fastening holes (reference holes);

39B: a fastening hole;

41: a first tube section;

42: a second cylinder part;

52: an upper bending portion (bending-inducing portion);

62: a flat portion (bending-inducing portion);

66: a frangible portion.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a bottom view of a main part of a vehicle body 1 to which a canister mounting structure is applied, and fig. 2 is a sectional view II-II in fig. 1. As shown in fig. 1 and 2, the vehicle body 1 is composed of a frame member and a panel member joined to the frame member. The frame member is a member having a closed cross section formed by press-molding a plurality of panel members, or a member having a channel shape formed by press-molding a panel member. Side members 2 extending in the front-rear direction are provided along the left and right side edges as framework members at the lower portion of the vehicle body 1, and a plurality of cross members 3 extending in the left-right direction (vehicle width direction) connect the left and right side members 2 at appropriate positions. A floor panel 4 made of a panel member is joined to the upper surface of these frame members.

A space is formed below the floor panel 4 between the front and rear cross members 3 on the vehicle inner side of the left and right side members 2, and a fuel tank 5 is disposed in the space. The fuel tank 5 is supported from below by a plurality of belt members 6 (only one of the left ends is shown) extending in the front-rear direction and mounted on a frame member of the vehicle body 1, specifically, the front and rear cross members 3. The belt members 6 are connected to each other by a connecting member 7 extending in the vehicle width direction. The fuel tank 5 is an important member to prevent damage as much as possible when the outer peripheral portion of the vehicle body 1 is deformed by a collision of the vehicle, and is provided at a position apart from the left and right side sills 2 toward the inside of the vehicle.

A canister 8 (canister) is disposed in a space between the left side member 2 and the fuel tank 5, i.e., on the left side of the fuel tank 5. The canister 8 adsorbs and holds fuel vapor (vapor) generated in the fuel tank 5, and releases the held vapor during engine operation. By feeding the vapor released from the canister 8 to the intake system, the discharge of the fuel vapor to the outside air is suppressed. A plurality of connection pipes, not shown, connected to the fuel tank 5 and the intake system are connected to the canister 8. The canister 8 is mounted to the vehicle body 1 via a bracket 10.

Fig. 3 is a perspective view of the bracket 10 viewed obliquely from above and from the front side. As shown in fig. 1 to 3, the bracket 10 includes: a first elongated member 11 extending in a front-rear direction, which is a direction substantially orthogonal to a vehicle width direction in which the fuel tank 5 and the canister 8 face each other; and two second members 12(12A, 12B) extending leftward from the intermediate portion in the longitudinal direction of the first member 11. The second member 12 includes a front-side second member 12A and a rear-side second member 12B that are disposed at mutually different positions in the front-rear direction.

The first member 11 is a member formed by processing a steel pipe, and includes: a first body portion 14 formed in a closed cross-sectional shape defining a hollow portion therein; and a pair of panel mounting portions 15 provided at both ends in the axial direction and mounted on the lower surface of the floor panel 4. In this way, the first member 11 has the first body portion 14 having a hollow closed cross-sectional shape between the pair of panel mounting portions 15, and thus is provided with high bending rigidity with a small amount of material. The panel attachment portion 15 is formed by forming a fastening bolt insertion hole 16 in two plate-like portions formed by overlapping each other by flattening the end portion of the steel pipe. The first member 11 is disposed between the fuel tank 5 and the canister 8, and is fastened to the lower surface of the floor 4 of the vehicle body 1 by fastening bolts 17 (fig. 1) at the pair of panel mounting portions 15.

The front second member 12A is an integral press-formed product formed by press-forming a steel plate, and includes a front second body 21, and the front second body 21 has a main surface facing upward and downward and extends in the left-right direction. A front-side joint portion 23 is formed at the right end of the front-side second body portion 21, and the front-side joint portion 23 is formed in an arc shape along the lower half portion of the first member 11 and is joined to the first member 11 by welding. A front-side body attachment portion 25 is formed at the left end of the front-side second body portion 21, and a bolt insertion hole 24 for fastening is formed in the front-side body attachment portion 25 so as to be attached to the lower surface of the side member 2. The front side second member 12A is fastened to the lower surface of the side member 2 of the vehicle body 1 at the front side vehicle body attachment portion 25 by a fastening bolt 17 (fig. 1, 2).

The front second body portion 21 has a front curved portion 26 curved so as to project downward at a middle portion in the longitudinal direction, and is formed in a V shape curved at an obtuse angle. A front flange 27 rising downward along the front edge is formed at the front end of the front second body 21. The front flange 27 includes two wedge-shaped portions having a lower height as they approach the front curved portion 26 of the front second main body portion 21. The front curved portion 26 of the front second body portion 21 constitutes a weak portion that is curved in a downwardly convex direction when the front second member 12A receives an axial load from the left, which is the vehicle exterior side. The front flange 27 is easily formed integrally with the front second body 21 by press forming, and can be implemented at low cost because it is not necessary to assemble other components. In addition, by adjusting the height of the front flange 27 along the extending direction of the front second body 21, the weak portion can be easily formed in the front second body 21.

A front support 28 is formed at the rear end of the front second body 21, and the front support 28 protrudes rearward from the rear edge of the right side portion of the front second body 21 with respect to the front bent portion 26, and supports the front end of the canister 8. Therefore, when the front second member 12A receives an axial load from the vehicle exterior side and deforms, the front support portion 28 is displaced together with the portion on the right side of the front curved portion 26. A fastening hole 29 is formed in the front side support 28.

The rear second member 12B is an integral press-formed product formed by press-forming a steel plate, and includes a rear second body portion 31 extending in the left-right direction, and a rear support portion 32 protruding forward from a front edge of the rear second body portion 31 and extending in the left-right direction. The rear support portion 32 extends rightward with respect to the right end of the rear second body portion 31, and a rear engagement portion 33 is formed at the right end of the rear support portion 32, and the rear engagement portion 33 is formed in an arc shape along the lower half portion of the first member 11 and is engaged with the first member 11 by welding. That is, the rear second body portion 31 extends leftward from the intermediate portion in the longitudinal direction of the first member 11 via the rear joining portion 33 and the rear supporting portion 32. The rear second body portion 31 extends leftward with respect to the left end of the rear support portion 32, and a rear body attachment portion 35 is formed at the left end of the rear second body portion 31, and a fastening bolt insertion hole 34 is formed in the rear body attachment portion 35 so as to be attached to the lower surface of the side member 2. The rear second member 12B is fastened to the lower surface of the side member 2 of the vehicle body 1 at the rear vehicle body attachment portion 35 by fastening bolts 17 (fig. 1).

The rear second body portion 31 has a rear curved portion 36 curved so as to project downward at a middle portion in the longitudinal direction, and is formed in a V shape curved at an obtuse angle. The rear second body portion 31 and the rear support portion 32 are continuous with each other at a portion on the right side of the rear curved portion 36. A rear flange 37 rising downward along the front edge of a portion on the left side of the rear bent portion 36 (a portion not continuous with the rear support portion 32) is formed at the front end of the rear second body portion 31. The rear flange 37 includes a wedge shape portion having a lower height as it gets closer to the rear bent portion 36. The rear-side bent portion 36 constitutes a weak portion that bends in a direction bulging downward when the rear-side second member 12B receives an axial load from the left, which is the vehicle exterior side. At this time, the rear side supporting portion 32 is displaced together with the portions (portions continuous with each other) of the rear side second body portion 31 on the right side of the rear side bent portion 36. The rear flange 37 can be easily formed integrally with the rear second body 31 by press forming, and can be implemented at low cost because no other components need to be assembled. In addition, by adjusting the height along the extending direction of the rear second body portion 31, a fragile portion can be easily formed in the rear second body portion 31.

The rear support portion 32 is a portion that supports the rear end of the canister 8, and also extends leftward with respect to a continuous portion that continues to the rear second body portion 31. In other words, a notch 38 reaching the rear curved portion 36 from the left end is formed in a continuous portion of the rear support portion 32 and the rear second body portion 31 that overlap each other in the left-right direction. Two fastening holes 39(39A, 39B) are formed in the rear side support portion 32 and arranged in the longitudinal direction. In this way, the front side support portion 28 of the front side second member 12A and the rear side support portion 32 of the rear side second member 12B are protrudingly provided on the corresponding front side second body portion 21 and rear side second body portion 31, and are located between the two second body portions 21, 22 (i.e., within a range surrounded by the two second body portions 21, 22 and the first member 11).

One 39A of the two fastening holes 39 is arranged at a position aligned with the rear-side bent portion 36 in the left-right direction. The other of the two fastening holes 39B is disposed in the vicinity of the rear side joining portion 33 with respect to the first member 11. Of the three fastening holes 29 and 39 formed in the bracket 10, the fastening hole 39A disposed in the vicinity of the rear-side bent portion 36 is a positioning reference hole that serves as a reference of position when the canister 8 is attached. Here, the reference hole is a hole having a size corresponding to the bolt and slightly larger than the diameter of the shaft portion of the bolt to be inserted. The other two fastening holes are formed with a slightly larger diameter than the reference hole so that a deviation of each component can be absorbed at the time of assembly.

The front side body attachment portion 25 of the front side second member 12A and the rear side body attachment portion 35 of the rear side second member 12B need only be attached to the constituent members of the vehicle body 1, and need not necessarily be attached to the side member 2. In other embodiments, they may also be mounted on the floor 4 of the vehicle body 1.

As shown in fig. 1 and 2, the canister 8 includes: a first tubular portion 41 disposed on the left side as the vehicle outer side and extending in the front-rear direction; and a second cylindrical portion 42 having a smaller diameter than the first cylindrical portion 41 and a longer axial length than the first cylindrical portion 41. The second tube portion 42 extends in the front-rear direction on the fuel tank 5 side with respect to the first tube portion 41, and is integrally formed with the first tube portion 41 so as to align with the first tube portion 41 at the rear end. The front end portion of the second tube portion 42 protrudes forward relative to the first tube portion 41. The canister 8 is disposed above the two second members 12 so as to straddle the front support 28 and the rear support 32, which are support portions thereof.

As shown in fig. 1, the canister 8 is attached to the front second member 12A by fastening the front end portion of the second tube portion 42 to the front support portion 28 of the front second member 12A with one fastening bolt 43. The canister 8 is attached to the rear second member 12B by fastening the rear end portion to the rear support portion 32 of the rear second member 12B with two fastening bolts 43. That is, the canister 8 is supported by the support portions (the front support portion 28 and the rear support portion 32) provided at the portions of the two second members 12 on the first member 11 side with respect to the

fragile portions

26 and 36. The front second body 21 of the front second member 12A is disposed at a position where the entire body is retracted forward from the front end of the canister 8. The rear second body 31 of the rear second member 12B is disposed at a position retreated rearward from the rear end of the canister 8.

The front second member 12A has the front curved portion 26 as the weak portion, and the rear second member 12B has the rear curved portion 36 as the weak portion, so that the total bending rigidity of the second members 12(12A, 12B) is lower than the bending rigidity of the first member 11 with respect to an input from the left side, which is the extending direction of the front second body portion 21. That is, the second member 12 is configured to be easily bent and deformed by a collision load at the time of a vehicle side collision (side collision). Therefore, when a collision load is input to the vehicle body 1 from the left side of the vehicle, the second member 12 is bent and deformed, so that the collision load is difficult to be transmitted to the first member 11. In this way, since the first member 11 has higher bending rigidity than the second member 12, the mounting positions of the first member 11 and the second member 12 of the bracket 10 are not restricted to the frame portion of the vehicle body 1 having higher rigidity. This improves the degree of freedom in the layout of the canister 8 and the holder 10.

Fig. 4 is a side view of the first member 11 shown in fig. 3. As shown in fig. 4, the first member 11 has a lower bent portion 51 convexly bent downward at the front side and an upper bent portion 52 convexly bent upward at the rear side of the intermediate portion in the longitudinal direction. The downward bent portion 51 is a bending-inducing portion that induces bending in a downward projecting direction when the first member 11 receives a compressive load in the axial direction. The upward bent portion 52 is a bending-inducing portion that induces bending in an upward bulging direction when the first member 11 receives a compressive load in the axial direction. Therefore, when the first member 11 receives a compressive load in the axial direction, it deforms so that the front portion thereof protrudes downward and the rear portion thereof protrudes upward (i.e., in a zigzag shape or an N-shape).

As shown in fig. 3, the front-side second member 12A is joined to the first member 11 in front of the lower bent portion 51, and the rear-side second member 12B is joined to the first member 11 in rear of the upper bent portion 52. That is, the front side second member 12A and the rear side second member 12B are provided at different positions in the longitudinal direction of the first member 11 with the upper bent portion 52 therebetween, which induces bending in a direction convex upward.

Fig. 5 is a view in the direction of V in fig. 3. As shown in fig. 5, the front side second member 12A is disposed substantially horizontally so that the front side joint portion 23 and the front side body attachment portion 25 are at substantially the same height as each other. The front curved portion 26 of the front second member 12A curves the front second body 21 so as to project downward, and the height of the front flange 27 is reduced at a portion corresponding to the front curved portion 26. Therefore, the front side bent portion 26 forms a weak portion, and when the collision load input from the vehicle exterior side acts on the front side second member 12A as the axial compression load, a bending deformation that protrudes downward is induced in the front side second member 12A. The rear-side bent portion 36 also constitutes a weak portion, and when a collision load input from the vehicle exterior side acts on the rear-side second member 12B as an axial compressive load, a bending deformation that bulges downward is induced in the rear-side second member 12B.

Next, the operation of the canister mounting structure thus configured at the time of a vehicle collision (at the time of a side collision) will be described with reference to fig. 6A to 6E.

Before a side collision, as shown in fig. 6A, the canister 8 is disposed between the side member 2 and the fuel tank 5, and is mounted to the vehicle body 1 via the bracket 10. As shown in fig. 6B, when a collision load is input from the vehicle exterior side, the side member 2 is bent and deformed to move toward the vehicle interior side. Thereby, an axial compressive load acts on the second member 12 of the bracket 10.

The first member 11 has high bending rigidity, and the

second body portions

21, 31 of the second member 12 have weak portions (front side bent portion 26, rear side bent portion 36) at the intermediate portions in the longitudinal direction, and the weak portions bend in a direction protruding downward when an axial load is applied from the vehicle exterior side. Therefore, the second member 12 that receives the compressive load is deformed to project downward from the weakened portions (the front-side bent portion 26 and the rear-side bent portion 36). The canister 8 is supported by the support portions (the front support portion 28 and the rear support portion 32) on the vehicle interior side with respect to the fragile portion of the second member 12, and is therefore rotationally displaced about the first member 11 so as to retract the first tubular portion 41 of large diameter disposed on the vehicle exterior side downward. This suppresses displacement of the canister 8 toward the fuel tank 5, which is an important component, and prevents the canister 8 from interfering with the fuel tank 5 disposed on the vehicle interior side of the first member 11.

When the side member 2 is further moved toward the vehicle interior side, as shown in fig. 6C and 6D, the bending deformation that causes the fragile portion of the second member 12 to protrude downward becomes large. Accordingly, the rotational displacement of the canister 8 increases, and therefore the first tube 41 of the canister 8 is displaced below the side member 2. The second tube portion 42 of the canister 8 is displaced to a position lower than the initial position, but is maintained at a height equivalent to the first member 11 and the lower portion of the side member 2. As described above, the front support 28 and the rear support 32 are positioned between the two

second body portions

21 and 31, and the canister 8 is attached to the front support 28 and the rear support 32. Therefore, even if the bending angle of the second member 12 is increased, the canister 8 is not sandwiched between the portion of the bent second member 12 on the first member 11 side and the portion on the vehicle exterior side.

When the side member 2 is further moved toward the vehicle interior side, the second tube portion 42 of the canister 8 is sandwiched between the side member 2 and the first member 11 as shown in fig. 6E. In this way, the canister 8 retracts the first tube 41 disposed on the vehicle outer side downward, and is held by the second tube 42 having a small diameter disposed on the first member 11 side. Therefore, the stroke from the initial position to the collision of the side member 2 with the canister 8 is increased, and thus, the breakage of the canister 8 can be suppressed.

As described with reference to fig. 5, the second member 12 is disposed such that the front-side joint portion 23 and the rear-side joint portion 33 joined to the first member 11 and the corresponding front-side body attachment portion 25 and rear-side body attachment portion 35 are at substantially the same height as each other. Further, since the canister 8 is disposed above the second member 12, when the canister 8 receives a collision load from the vehicle exterior and is displaced downward by deformation of the second member 12, the canister 8 is sandwiched between the first member 11 of the bracket 10 and the side member 2. This can prevent the canister 8 from being displaced toward the vehicle interior side beyond the first member 11, the canister 8 from being excessively displaced downward, and the canister 8 from falling off.

In this way, in the present embodiment, the second member 12, which is easily bent and deformed, supports the canister 8. Therefore, during a collision, the canister 8 is displaced so as to be retracted from the adjacent position on the vehicle outside of the fuel tank 5 in accordance with the bending deformation of the second member 12, and is not largely displaced from the first member 11 toward the fuel tank 5. Therefore, interference between the canister 8 and the fuel tank 5 disposed adjacent to the vehicle interior side can be suppressed, and breakage of the fuel tank 5 can be suppressed.

As described with reference to fig. 4, the first member 11 has an upper bent portion 52 at an intermediate portion in the longitudinal direction, and the upper bent portion 52 induces bending in an upward bulging direction when receiving a compressive load in the axial direction. As described above, the front second member 12A and the rear second member 12B are provided so as to sandwich the upper bent portion 52. Therefore, when the compressive load in the axial direction acts on the first member 11, the front joining portion 23 of the front second member 12A and the rear joining portion 33 of the rear second member 12B are displaced upward by the same degree. Thus, when the first member 11 is deformed by the axial compressive load, the canister 8 displaced downward by the deformation of the second member 12 can be prevented from being displaced downward excessively. In this case, the canister 8 can be prevented from being displaced so as to be inclined with respect to the extending direction of the first member 11.

Further, since one fastening hole 39A of the plurality of fastening holes 39 formed in the rear side support portion 32 of the rear side second member 12B is a reference hole for positioning, when a load at the time of collision is applied to the canister 8, the canister 8 transmits the load from the reference hole to the fragile portion of the rear side second member 12B without rattling. This allows the rear second member 12B to be effectively deformed, and movement of the canister 8 in the extending direction of the rear second body portion 31 is suppressed, so that the canister 8 is not displaced more toward the fuel tank 5 than the first member 11.

First modification

Next, a first modification of the present embodiment will be described with reference to fig. 7. The same or similar elements as those in the above embodiment are denoted by the same reference numerals, and redundant description thereof is omitted. The same applies to the following modifications.

Fig. 7 is a side view of the first member 11 of the first modification. As shown in the drawings, in the present modification, the configuration of the first member 11 of the bracket 10 is different from that of the above-described embodiment. Specifically, an upward curved portion 52 that protrudes upward is provided in a gently curved manner so as to have a longer axial length than the above-described embodiment at the intermediate portion in the longitudinal direction of the first body portion 14 of the first member 11. The upward bent portion 52 (particularly, the intermediate portion thereof) serves as a bending-inducing portion that induces bending in an upward bulging direction when the first member 11 receives a compressive load in the axial direction. The panel attachment portions 15 provided at both ends of the first member 11 in the axial direction are inclined with respect to the front-rear direction in accordance with the inclination of the first body portion 14. Even if the first member 11 is configured in this manner, the same operational effects as those of the above-described embodiment can be obtained.

Second modification example

Next, a second modification of the present embodiment will be described with reference to fig. 8A to 8C. Fig. 8A is a side view of the first member 11 of the second modification, fig. 8B is a sectional view B-B in fig. 8A, and fig. 8C is a sectional view C-C in fig. 8A. As shown in the drawing, in the present modification, a flat portion 62 having a substantially elliptical shape and being laterally long by flattening the lower portion of the steel pipe upward is provided in the middle portion in the longitudinal direction of the first body portion 14 of the first member 11. In the flat portion 62, the second moment of area is smaller than the other portions of the first body portion 14, and the horizontal neutral axis of the second moment of area is located above. Therefore, the flat portion 62 serves as a bending-inducing portion that induces bending in an upward bulging direction when the first member 11 receives a compressive load in the axial direction. Even if the first member 11 is configured in this manner, the same operational effects as those of the above-described embodiment can be obtained.

Third modification example

Next, a third modification of the present embodiment will be described with reference to fig. 9. Fig. 9 is a bottom view of the second member 12 of the third modification. As shown in the drawings, in the present modification, the structure of the second member 12 of the bracket 10 is different from that of the above-described embodiment. The second member 12 may be provided in one or two with respect to the first member 11. The second member 12 has two rigidity patches 71 joined to the upper surface or the lower surface of the second body 21 so as to be separated from each other at the middle portion in the longitudinal direction. The portion to which the rigidity patch 71 is joined has high rigidity as compared with the portion between the two rigidity patches 71. Therefore, the portion between the two rigid patches 71 becomes the fragile portion 66 of the second member 12. In order to bend the fragile portion so as to protrude downward when the first member 11 receives a compressive force in the axial direction, the second body portion 21 may be bent so as to protrude downward at the fragile portion 66, as in the above-described embodiment. Even if the second member 12 is configured in this manner, the same operational effects as those of the above-described embodiment can be obtained. In this way, by adopting the structure in which the rigidity patch 71 is joined to the second member 12, the thickness of the second body portion 21 in the vehicle height direction can be kept thin, and a portion with high rigidity can be formed in the second body portion 21, so that the degree of freedom in layout of the bracket 10 is improved.

The above description of the specific embodiments has been completed, but the present invention is not limited to the above embodiments, and can be widely modified. For example, in the above-described embodiment, the fuel tank 5 is shown as an example of an important component disposed adjacent to the canister 8, but the important component may be a secondary battery or a fuel cell for traveling. In the above embodiment, the canister 8 is disposed on the vehicle side of the fuel tank 5, which is an important component, but the canister 8 may be disposed behind the fuel tank 5. The bracket 10 may be composed of a first member 11 and 1 second member 12 joined to the first member 11, and the canister 8 may be supported by the 1 second member 12. The specific structure, arrangement, number, angle, material, and the like of each member or portion may be appropriately changed without departing from the scope of the present invention. On the other hand, all of the components shown in the above embodiments are not necessarily essential, and may be appropriately selected.

Claims

1. A canister mounting structure for mounting a canister to a position adjacent to an important member mounted to a lower surface of a vehicle body on a vehicle exterior side via a bracket,

the bracket has:

a first member extending along a lower surface of the vehicle body between the important member and the canister in a direction substantially perpendicular to a direction in which the important member and the canister are opposed to each other, and having a pair of panel mounting portions mounted on a lower surface of a floor of the vehicle body; and

at least one second member having a second body portion extending from a longitudinal intermediate portion of the first member toward the vehicle exterior side, a vehicle body attachment portion attached to a component of the vehicle body, and a support portion supporting the canister,

the first member has higher bending rigidity against an input from the second body portion in the extending direction than the second member.

2. The canister mounting structure according to claim 1,

the first member has a body portion between the pair of panel mounting portions, the body portion having a closed cross-sectional shape defining a hollow portion therein.

3. The canister mounting structure according to claim 1 or 2,

the second body portion of the second member has a weak portion at a longitudinal intermediate portion, and the weak portion is bent in a downwardly convex direction when an axial load is applied from the vehicle exterior side.

4. The canister mounting structure according to claim 3,

the first member has a bending-inducing portion that induces bending in an upward-bulging direction when receiving a compressive load in an axial direction at a longitudinal intermediate portion thereof,

at least one of the second members includes two of the second members provided at different positions in a longitudinal direction of the first member with the bending-inducing portion interposed therebetween,

the canister is disposed across the support portions of the two second members.

5. The canister mounting structure according to claim 4,

the supporting parts are arranged on the corresponding second main body parts in a protruding mode and located between the two second main body parts.

6. The canister mounting structure according to claim 3,

at least one of the second members is configured such that an engaging portion with which the first member is engaged and the vehicle body mounting portion are at substantially the same height as each other,

the canister is disposed above the second member.

7. The canister mounting structure according to claim 3,

at least two fastening holes arranged on the first member side and the vehicle outer side in the longitudinal direction of the second member are formed in the support portion of at least one of the second members, and one of the fastening holes is a reference hole for positioning.

8. The canister mounting structure according to claim 1,

the important component is a fuel tank, a secondary battery for running, or a fuel cell.