CN112208644A

CN112208644A - vehicle superstructure

Info

Publication number: CN112208644A
Application number: CN202010525103.5A
Authority: CN
Inventors: 河津礼可; 田村浩章
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2019-07-11
Filing date: 2020-06-10
Publication date: 2021-01-12
Anticipated expiration: 2040-06-10
Also published as: JP2021014184A; CN112208644B; JP6918866B2

Abstract

The invention provides a vehicle upper structure capable of ensuring the mounting rigidity of a roof panel and a roof arch. A vehicle superstructure (1) comprises a pair of left and right roof side rails (10) extending in the front-rear direction, a roof panel (40) disposed between the pair of left and right roof side rails (10), and a roof dome (50) extending in the left-right direction and disposed on the lower side of the roof panel (40), wherein the pair of left and right roof side rails (10) and the roof panel (40) are fixed to each other by brazing, the roof panel (40) and the roof dome (50) are fixed to each other by adhesion using a sealant (S), and the gap on the roof side (10) side is larger than the gap in the center portion in the left-right direction of the roof dome (50) with respect to the gap between the roof panel (40) and the roof dome (50) in which the sealant (S) is disposed.

Description

Vehicle superstructure

Technical Field

The present invention relates to a vehicle upper structure.

Background

In an upper portion of a vehicle, a roof side rail and a roof panel are fixed by brazing (see patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-99950

Disclosure of Invention

Problems to be solved by the invention

The roof dome is fixed to the lower surface of the roof panel by adhesion using a sealant. When the roof side rail and the roof panel are joined by brazing, the roof panel may expand and contract due to heating and heat removal with respect to the solder, and thus may affect fixation using the sealant.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a vehicle upper structure capable of securing mounting rigidity between a roof panel and a roof dome.

Means for solving the problems

In order to solve the above problem, a vehicle upper structure according to the present invention includes: a pair of left and right roof side rails extending in the front-rear direction; a roof panel provided between a pair of the right and left roof side rails; and a roof dome extending in a left-right direction and provided at a lower side of the roof panel, the vehicle body superstructure being characterized in that a pair of left and right roof side rails and the roof panel are fixed to each other by brazing, the roof panel and the roof dome are fixed to each other by bonding using a sealant, and a gap provided between the roof panel and the roof dome for the sealant is larger at a rail side of the roof side than at a central portion of the roof dome in the left-right direction.

Effects of the invention

According to the present invention, the influence of the brazing bonding of the roof side rail and the roof panel on the fixing of the roof panel and the roof dome by the sealant can be suppressed, and the mounting rigidity of the roof panel and the roof dome can be appropriately secured.

Drawings

Fig. 1 is a plan view schematically showing a vehicle of a vehicle upper part structure to which an embodiment of the invention is applied.

Fig. 2 is a sectional view schematically showing a vehicle upper structure of the embodiment of the invention.

Fig. 3 is a cross-sectional view schematically showing the state of the sealant provided between the roof panel and the roof dome, (a) is a view showing a state before brazing, (b) is a view showing a state during brazing, and (c) is a view showing a state after brazing.

Fig. 4 is a view schematically showing a state of a vehicle upper structure during brazing, (a) is a view schematically showing a state of a roof panel, and (b) is a cross-sectional view schematically showing states of a roof side rail, the roof panel, and a solder.

Fig. 5 is a view schematically showing a state of a vehicle upper structure after brazing and joining, (a) is a perspective view schematically showing a state of a roof panel, and (b) is a cross-sectional view schematically showing states of a roof side rail, the roof panel, and a solder.

Description of the reference numerals

1 vehicle superstructure

10 roof side rail

40 vehicle roof board

50 roof dome

B solder

S sealant

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components are denoted by the same reference numerals, and redundant description thereof is omitted. Terms indicating directions such as up and down, front and back, and left and right (vehicle width direction) are based on a vehicle and an occupant (driver) of the vehicle.

As shown in fig. 1, a vehicle upper structure 1 of the embodiment of the invention includes a pair of left and right roof side rails 10, a roof panel 40, and a plurality of roof domes 50.

< roof side rail >

The roof side rail 10 is a metal structural member that extends in the front-rear direction at an end portion in the left-right direction (vehicle width direction) of the vehicle body and at an upper end portion.

< roof plate >

The roof panel 40 is a metal plate-like member that spans between the pair of left and right roof side rails 10 and constitutes a ceiling surface of the vehicle C.

< crown of roof >

The roof dome 50 is a metal structural member that is provided below the roof panel 40 and extends in the left-right direction (vehicle width direction) along the lower surface of the roof panel 40. In the present embodiment, the vehicle upper structure 1 is provided with 5 roof arches 50. The foremost roof dome 50 is bridged between a pair of left and right first front pillars P1 (see fig. 4 and 5, so-called a-pillars) at the front end portion of the roof panel 40. The second front roof dome 50 is bridged between a pair of right and left second front pillars P2 (so-called a' pillars in fig. 4 and 5) near the front end of the roof panel 40. The third roof arch 50 is bridged between a pair of right and left center pillars P3 (see fig. 4 and 5, so-called B-pillars). The fourth top dome 50 is mounted between a pair of left and right rear pillars P4 (see fig. 4 and 5, so-called C-pillars). The fifth roof dome 50 is bridged between a pair of right and left pillars P5 (see fig. 4 and 5, so-called D-pillars) in a rectangular frame constituting an opening portion for a tailgate at the rear end portion of the roof panel 40.

The following description will be given mainly taking as an example the peripheral structure of the foremost dome 50 from the left end portion to the vehicle width direction center portion.

As shown in fig. 2, the vehicle upper structure 1 includes a roof side rail 10, a pillar inner 20, a reinforcement 30, a roof panel 40, and a roof dome 50.

< roof side rail >

The roof side rail 10 integrally includes: an outer wall portion 11; an upper wall portion 12 extending inward in the vehicle width direction from an upper end portion of the outer wall portion 11; an inner wall portion 13 extending downward from an inner end portion of the upper wall portion in the vehicle width direction; and a flange portion 14 extending inward in the vehicle width direction from a lower end portion of the inner wall portion 13. The roof side rail 10 is integrally formed with a pillar outer 60 that constitutes the vehicle body pillar (first front pillar P1) on the vehicle width direction outer side.

< inner member of column >

The pillar inner 20 is a metal structural member that extends in the vertical direction and constitutes the vehicle width direction inner portion of the pillar (first front pillar P1) of the vehicle body.

< reinforcing Member >

The reinforcement 30 is a metal plate-like member extending in the vertical direction and interposed between the pillar outer 60 and the pillar inner 20 to reinforce the pillar (the first front pillar P1). The reinforcement 30 integrally includes a reinforcement body 31 and a flange portion 32 extending inward in the vehicle width direction from an upper end portion of the reinforcement body 31.

The flange portion 32 is joined to the flange portion 14 of the roof side rail 10 by welding or the like. The flange portion 32 is joined to the roof dome 50 (the front flange portion 53 and the rear flange portion) by welding or the like.

< roof plate >

The roof panel 40 integrally includes a roof panel main body 41 constituting a roof surface of the vehicle and a flange portion 42 extending downward from an end portion of the roof panel main body 41 in the vehicle width direction. In the present embodiment, the plurality of bead portions 41a are formed in the roof panel main body portion 41 so as to be aligned in the vehicle width direction. The bead portions are convex portions (convex grooves) extending in the front-rear direction and projecting upward, and the roof panel main body portion 41 is fixed to the roof dome 50 at a portion where the bead portions 41a are not formed.

< crown of roof >

The roof dome 50 is mounted on the lower surface of the roof panel 40, and constitutes a closed section when viewed from the side in cooperation with the roof panel 40. The roof dome 50 extends downward at its end in the vehicle width direction and is joined to the upper end of the pillar inner 20 by welding or the like. The top cover dome 50 integrally includes: a lower wall portion 51; a front wall 52 extending upward from a front end of the lower wall 51; a front flange portion 53 extending forward from an upper end portion of the front wall portion 52; a rear wall portion extending upward from a rear end portion of the lower wall portion 51; and a rear flange portion extending rearward from an upper end portion of the rear wall portion.

The roof panel 40 and the roof dome 50 are formed to be curved in a convex manner when viewed from the front. The curvature of the roof dome 50 (front and rear flange portions) is larger than the curvature of the roof panel 40 (roof panel main body portion 41). In other words, the roof dome 50 has a smaller radius of curvature than the roof panel 40. Therefore, the roof dome 50 is spaced apart from the roof panel 40 from the vehicle width direction center portion of the roof dome 50 toward the vehicle width direction end portion.

As shown in fig. 3 (a), the lower surface of the roof panel 40 (roof panel main body portion 41) and the upper surface of the roof dome 50 (front flange portion 53 and rear flange portion) are fixed to each other by adhesion using a sealant (e.g., an adhesive sealant) S. As shown in fig. 2, in one roof dome 50, the gap between the roof panel 40 and the roof dome 50, in which the sealant S is provided, is set so that the gap at the vehicle width direction end portion (the roof side rail 10 side) is larger than the gap at the vehicle width direction center portion of the roof dome 50 (w3 > w2 > w 1).

As another example of the gap between the roof panel 40 and the roof dome 50, as shown in fig. 1, the gap at the center X1 of the third roof dome 50 from the front is set to be the smallest. In addition, the gap at the center portion X2 of the fourth top cover dome 50 from the front is set to be larger than the gap at the center portion X1 of the third top cover dome. Further, the gaps at the both end portions X3 of the third and fourth top cover domes 50 from the front are set to be larger than the gap at the center portion X2 of the fourth top cover dome. The gap at the center portion X4 of the first and second roof arches 50 is set to be the same as the gap at the both end portions X3 of the third and fourth roof arches. Further, the gap at the two end portions X5 of the first and second top cover domes 50 is set to be larger than the gap at the two end portions X3 of the third and fourth top cover domes and the central portion X4 of the first and second top cover domes.

Roof side rails and roof Panel joints

As shown in fig. 4 (b) and 5 (b), an inclined portion 13a that is directed inward in the vehicle width direction as it goes downward is formed at a height direction intermediate portion of the inner wall portion 13 of the roof side rail 10. A convex portion 42a having an arc shape protruding outward in the vehicle width direction is formed at an upper end portion of the flange portion 42 of the roof panel 40. The roof side rail 10 and the roof panel 40 are fixed to each other by joining (brazing) using a solder B provided in a groove portion formed by the inclined portion 13a and the convex portion 42 a.

When the roof side rail 10 and the roof panel 40 are joined by brazing, the solder B is heated, and therefore, the roof side rail 10 and the roof panel 40 expand in the front-rear direction (see fig. 4 (a)) and expand in the vehicle width direction (see fig. 4 (B)) around the portion being processed. After the processing, the solder B removes heat, and therefore the roof side rail 10 and the roof panel 40 contract in the front-rear direction (see fig. 5 a) and contract in the vehicle width direction (see fig. 5B).

On the other hand, when the roof panel 40 thermally expands, the roof panel 40 extends so as to be recessed downward. Therefore, the sealant S provided between the roof panel 40 and the roof dome 50 is crushed and deformed by the gap crush associated with the expansion of the roof panel 40 due to the heating of the solder B (see fig. 3 (a) → fig. 3 (B)). When the roof panel 40 thermally contracts, the roof panel 40 contracts so as to return upward. Therefore, the sealant S deforms so as to narrow in comparison with the space before the heating of the solder B due to the gap recovery caused by the contraction of the roof panel 40 due to the heat removal of the solder B (see fig. 3 (B) → 3 (c)). Here, the thermal influence on the roof panel 40 caused by the brazing bonding is not uniform over the entire roof panel 40. That is, the heat influence particularly on the side end of the roof side rail 10 of the roof panel 40 close to the heat source is larger than the heat influence on the center portion of the roof panel 40 in the vehicle width direction.

Here, since the gap between the roof panel 40 and the roof dome 50 at a position close to the roof side rail 10 is set to be large, the sealant S does not move to other portions due to the gap collapse at the time of thermal deformation, and a sufficient amount of sealant S remains. Therefore, even if the gap is recovered after the thermal deformation, the sealant S is less likely to be narrowed. Further, since the gap between the roof panel 40 and the roof dome 50 at a position far from the roof side rail 10 is set to be small, the width of the gap recovery after the thermal deformation is suppressed, and the sealant S is prevented from being elongated to the limit and the adhesiveness is prevented from being lowered.

The vehicle upper structure 1 according to the embodiment of the present invention is characterized by including: a pair of left and right roof side rails 10 extending in the front-rear direction; a roof panel 40 provided between a pair of the left and right roof side rails 10; and a roof dome 50 extending in the left-right direction and provided on a lower side of the roof panel 40, the pair of left and right roof side rails 10 and the roof panel 40 being fixed to each other by brazing, the roof panel 40 and the roof dome 50 being fixed to each other by adhesion using a sealant S, the gap on the roof side rail 10 side being larger than the gap at a center portion in the left-right direction of the roof dome 50 with respect to a gap between the roof panel 40 and the roof dome 50 in which the sealant S is provided.

Therefore, the vehicle upper structure 1 can suppress the influence of the brazing joining of the roof side rail 10 and the roof panel 50 on the sealant fixation of the roof panel 40 and the roof dome 50, and can appropriately ensure the mounting rigidity (mounting strength) of the roof panel 40 and the roof dome 50.

Further, the vehicle upper structure 1 is characterized in that the roof panel 40 and the roof dome 50 are formed to be curved so as to bulge upward in front view, and the curvature of the roof dome 50 is larger than the curvature of the roof panel 40.

Therefore, the vehicle upper structure 1 can appropriately set the gap between the roof panel 40 and the roof dome 50 with a simple configuration.

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and can be modified as appropriate within a range not departing from the gist of the present invention.

Claims

1. A vehicle superstructure comprising:

a pair of left and right roof side rails extending in the front-rear direction;

a roof panel provided between a pair of the right and left roof side rails; and

a roof dome extending in the left-right direction and provided at a lower side of the roof panel,

the vehicle body upper part structure is characterized in that,

the pair of left and right roof side rails and the roof panel are fixed to each other by brazing,

the roof panel and the roof dome are fixed to each other by adhesion using a sealant,

with respect to the gap between the roof panel and the roof arch for the sealant to be provided, the gap on the rail side of the roof side is larger than the gap at the center portion in the left-right direction of the roof arch.

2. The vehicle superstructure according to claim 1,

the roof panel and the roof dome are formed by bending in a manner of bulging upward when viewed from the front,

the roof dome has a curvature greater than a curvature of the roof panel.