CN103608246A

CN103608246A - Vehicle body side structure

Info

Publication number: CN103608246A
Application number: CN201280029149.1A
Authority: CN
Inventors: 盐崎毅; 藤田毅
Original assignee: NKK Corp
Current assignee: JFE Engineering Corp
Priority date: 2011-06-14
Filing date: 2012-06-13
Publication date: 2014-02-26
Anticipated expiration: 2032-06-13
Also published as: TW201304994A; TWI466793B; CN103608246B; JP5246300B2; KR20140021028A; KR101471947B1; WO2012173278A1; JP2013001171A

Abstract

Provided is a vehicle body side structure that can afford lighter weight while ensuring rigidity and strength, in a vehicle body side structure of a side sill and a center pillar joined together. The vehicle body side structure (1) is formed by a side sill (3) and a center pillar (5) joined together, and is characterized in that the center pillar (5), at the bottom end side thereof, is joined to the side sill (3) so as to cover the two outside surfaces of the inner and outer of the side sill (3), the side sill (3) being provided with: a closed-cross-section component (9) that has a closed cross section constituted by forming a single blank panel into a tubular shape and joining the two edges together, with a flange portion (7) that has two edges being disposed at the vehicle interior side; and a reinforcing component (13) disposed inside the closed-cross section component (9), at a minimum within the area thereof where the center pillar (5) is joined, and attached in such a way as to connect the facing longitudinal walls of the closed-cross section component (9).

Description

Vehicular side body structure

Technical field

The present invention relates to the Vehicular side body structure of longeron and center pillar under the comprising in automobile.

Background technology

About the body construction of automobile, for the Vehicular side body structure that comprises lower longeron and center pillar, for example, in patent documentation 1, disclose take and can tackle more fully " the bottom body construction of automobile " that near collision center pillar is object.

Form the lower longeron of patent documentation 1 disclosed Vehicular side body structure, the flange part of the lower longeron inner component that the open cross-sections parts by having flange part are formed and same lower these two parts of longeron exterior part that consist of the open cross-sections parts with flange part aligns and engages, and forms thus closed section.

In addition, center pillar consists of with the post exterior part that is similarly open cross-sections parts the post inner component of open cross-sections parts, post exterior part engages with lower longeron exterior part, post inner component engages with post exterior part and engages in the mode of being clamped by lower longeron inner component and lower longeron exterior part, thereby forms the Vehicular side body structure that comprises lower longeron and center pillar.

Prior art document

Patent documentation

Patent documentation 1: TOHKEMY 2009-202620 communique

Summary of the invention

Invent problem to be solved

In the disclosed such Vehicular side body structure in the past of patent documentation 1, within the scope of the length direction of lower longeron, must there is the both sides' of lower longeron exterior part and lower longeron inner component flange part to exist.

Yet the desired rigidity of lower longeron, intensity are partly controlled by the closed section of lower longeron, flange part to rigidity, intensity without help.Therefore,, from pursuing the viewpoint of the lightness of vehicle body, the existence of flange part becomes unfavorable factor.

The present invention In view of the foregoing makes, and its object is to provide a kind of Vehicular side body structure, in the Vehicular side body structure engaging, can when guaranteeing rigidity, intensity, seek lightness at lower longeron with center pillar.

For solving the means of problem

(1) Vehicular side body structure of the present invention, that lower longeron engages the Vehicular side body structure forming with center pillar, it is characterized in that, the mode that described center pillar covers the inner component of described lower longeron and exterior part both sides' outside face with its lower end side engages with lower longeron, described lower longeron possesses: closed section parts, a blank plate is configured as to tubular and thereby both ends are engaged and form closed section, and the flange part consisting of described both ends is configured in car inner side; Strengthening part, in the inside of these closed section parts, this strengthening part is at least disposed at and engages the region that has described center pillar, and installs in the mode that the relative longitudinal wall of described closed section parts is connected.

(2) in addition, in the Vehicular side body structure of recording, it is characterized in that in above-mentioned (1), the flange part of the described car inner side of described closed section parts engages with base plate.

(3) in addition, in the Vehicular side body structure of recording, it is characterized in that in above-mentioned (1) or (2), described center pillar is overlapping with respect to the engage position of described closed section parts with respect to engage position and the described strengthening part of described closed section parts.

The effect of invention

In the present invention, in the Vehicular side body structure engaging with center pillar at lower longeron, the mode that described center pillar covers the inner component of described lower longeron and exterior part both sides' outside face with its lower end side engages with lower longeron, described lower longeron possesses: closed section parts, a blank plate is configured as to tubular and thereby both ends are engaged and form closed section, and the flange part consisting of described both ends is configured in car inner side; Strengthening part, in the inside of these closed section parts, this strengthening part is at least disposed at and engages the region that has described center pillar, and installs in the mode that the relative longitudinal wall of described closed section parts is connected, by adopting above-mentioned formation, can when guaranteeing rigidity, intensity, realize lightness.

Accompanying drawing explanation

Fig. 1 is the block diagram of the Vehicular side body structure of an embodiment of the invention, represents to observe from car inner side the state that exterior part panel is taken off.

Fig. 2 be Fig. 1 to looking A-A cutaway view.

Fig. 3 is for confirming the instruction diagram of test body (inventive example) of the effect of Vehicular side body structure of the present invention.

Fig. 4 is the in-built instruction diagram of the test body shown in Fig. 3.

Fig. 5 is for confirming the instruction diagram of test body (conventional example) of the effect of Vehicular side body structure of the present invention.

Fig. 6 is the in-built instruction diagram of the test body shown in Fig. 5.

Fig. 7 is the instruction diagram of implosion test method.

Fig. 8 means the figure of implosion test result.

Fig. 9 is the instruction diagram of Strength Testing Methods.

Figure 10 means the figure of strength test result.

The specific embodiment

According to Fig. 1, Fig. 2, the Vehicular side body structure 1 of present embodiment is described.

The Vehicular side body structure 1 of present embodiment as shown in Figure 1 and Figure 2, is the structure that lower longeron 3 engages with center pillar 5.

The lower longeron 3 of present embodiment possesses: closed section parts 9, thus a blank plate is configured as to tubular and both ends are engaged and form closed section, and the flange part 7 consisting of above-mentioned both ends is configured in car inner side; Strengthening part 13, in the inside of these closed section parts 9, installs this strengthening part 13 to connect the mode of the relative longitudinal wall of closed section parts 9.

And in the car outside of closed section parts 9, center pillar exterior part 5a is to cover the surperficial mode welded joint of closed section parts 9.In addition, in the car inner side of closed section parts 9, center pillar inner component 5b is to cover the surperficial mode welded joint of closed section parts 9.

In addition, as shown in Figure 2, the flange part 7 that is formed at the car inner side of above-mentioned closed section parts 9 engages with base plate 15.In addition in Fig. 1, omitted, the diagram of base plate 15.

The strengthening part 13 of present embodiment, as shown in Figure 2, is at least configured in the region that closed section parts 9 engage with center pillar exterior part 5a and center pillar inner component 5b.

By strengthening part 13 is set like this, when lower longeron 3 is applied to external force, strengthening part 13 can prevent the section deformation of closed section parts 9, can obtain high rigidity and intensity.

In addition, the axial region of the lower longeron 3 of strengthening part 13 being set, as described above, is at least the region that closed section parts 9 engage with center pillar exterior part 5a and center pillar inner component 5b, also can surpass this ground, region and arrange.

In addition, in the present embodiment, form the closed section parts 9 of lower longeron 3 and the engage position of strengthening part 13 and closed section parts 9 overlapping with the engage position of center pillar exterior part 5a and center pillar inner component 5b.If such engage position relation,, when other cars side collision that side collision is come from car, the power of transmitting from center pillar 5 is dispersed to and forms, closed section parts 9 and the strengthening part 13 of longeron 3, therefore can access better intensity.

In the Vehicular side body structure 1 of the present embodiment forming as described above, due to the flange part of the position, top and bottom that does not exist the total length of the top and bottom of longeron under the spreading all over as conventional example to exist, so the effect of lightness is high.

In addition, the inside by the closed section parts of longeron 3 under forming arranges strengthening part 13, can prevent the section deformation of closed section parts 9, thereby have high rigidity and intensity.

That is to say, in the Vehicular side body structure 1 of present embodiment, omit in conventional example, exist to rigidity, intensity without the flange part helping, and by contributing to the parts of rigidity, intensity to form lower longeron, therefore when maintaining desired rigidity, intensity, can realize lightness.

And in the present embodiment, the flange part 7 that is formed at closed section parts 9 is different from the flange part of the conventional example without any function, but as playing a role with the junction surface of base plate 15.

In addition, the position of the short transverse of flange part 7, is not necessary for the lower end of closed section parts 9, can be also the position higher than lower end.

Embodiment

Carried out the performance test of the Vehicular side body structure 1 of above-mentioned present embodiment, be therefore described.

Fig. 3, Fig. 4 are the instruction diagrams of the test body (example test body 21) of the Vehicular side body structure 1 of present embodiment, Fig. 3 is the block diagram that example test body 21 is observed from car inner side, and Fig. 4 observes the block diagram of example being tested to the state that the longitudinal wall of the center pillar inner component 5b of body 21 and the car of longeron 3 inner side pulls down from car inner side.In Fig. 3, Fig. 4, represent example test body 21 each several part Reference numeral be labeled in identical in Fig. 1, Fig. 2.

In addition as shown in Figure 4, be configured to the region that the strengthening part 13 of example test body 21 engages with center pillar exterior part 5a and center pillar inner component 5b just over closed section parts 9 in the axial front and back of lower longeron 3.

Fig. 5, Fig. 6 are the instruction diagrams of the test body (conventional example test body 31) of conventional example, and Fig. 5 is the block diagram of observing from car inner side, Fig. 6 be from car inner side observe by the block diagram of the state pulled down of longeron inner component 33b.Known according to Fig. 5, Fig. 6, as conventional example test body 31, lower longeron 33 consists of with the lower longeron exterior part 33a that is similarly open cross-sections parts the lower longeron inner component 33b of open cross-sections parts, the upper and lower flange part 35 of these two open cross-sections parts is docked and engaged the lower longeron 33 that forms thus closed section.In addition, center pillar 36 consists of with the post exterior part 36a that is similarly open cross-sections parts the post inner component 36b of open cross-sections parts, post exterior part 36a engages with lower longeron exterior part 33a, and post inner component 36b engages with post exterior part 36a and engages in the mode of being clamped by lower longeron inner component 33b and lower longeron exterior part 33a.

Each size of testing body is as shown in Fig. 3, Fig. 5.In addition, the material using is for conventional example and the inventive example, and all parts are all the steel plates of thickness of slab 1.2mm.

Fig. 7 is the instruction diagram that the implosion test method of 21 pairs of the present embodiment of use example test body describes.According to Fig. 7, implosion test method is described.

Example is tested to the rear and front end face of the lower longeron 3 of body 21 and is fixed, in the upper end of center pillar 5, apply respectively the place ahead to load (Fx), the load (Fy) of interior direction, the load (Fz) of upper direction.As load level, the place ahead to time be 10kN, during interior direction, be 1kN, during upper direction, be 10kN.

The conventional example test body 31 of expression based on implosion test and the comparative result of example test body 21 in Fig. 8.

In addition,, for the rigidity of each test body, in order to obtain the rigidity of unit weight, the rigidity of the unit weight of the conventional example of take test body 31 is benchmark, represents the rigidity ratio of example test body 21.

When be applied with as shown in Figure 8 (a) the place ahead to load time, example test body 21 is in a ratio of approximately 1.2 times with conventional example test body 31.In addition, as shown in Figure 8 (b) shows, when applying the load of interior direction, example test body 21 is in a ratio of approximately 7 times with conventional example test body 31.In addition, as shown in Fig. 8 (c), when being applied with the load of direction, example test body 21 is in a ratio of approximately 4 times with conventional example test body 31.

Like this, confirmed that example test body 21 all possesses the rigidity over conventional example test body 31 for arbitrary load direction.

Next, carried out the strength test of imaginary side collision, be therefore described.

In strength test, as shown in Figure 9, from car outside towards car inner side, with the drift 37 that second, speed 10m emitted front-end radius 100mm, lower longeron 3 and the junction surface of center pillar 5 are clashed into.Load during shock is measured by being arranged on the force transducer 39 of the position of the both ends of lower longeron 3 and the upper end of center pillar 5.And the summation of the output valve by 3 force transducers 39 is carried out the performance of ranking test body.

The conventional example test body 31 of expression based on strength test and the comparative result of example test body 21 in Figure 10.

As shown in figure 10, compare with conventional example test body 31, example test body 21 shows the resistant load of approximately 1.3 times.

According to above test results, confirmed that the present invention compares with conventional example when maintaining rigidity, intensity, to realize the Vehicular side body structure of lightness.

The explanation of Reference numeral

1 Vehicular side body structure

3 times longerons

5 center pillars

5a center pillar exterior part

5b center pillar inner component

7 flange parts

9 closed section parts

13 strengthening parts

15 base plates

21 example test bodies

31 conventional example test bodies

33 times longerons

Longeron exterior part under 33a

Longeron inner component under 33b

35 flange parts

36 center pillars

36a post exterior part

36b post inner component

37 drifts

39 force transducers

Claims

1. a Vehicular side body structure, is that lower longeron engages the Vehicular side body structure forming with center pillar, it is characterized in that,

The mode that described center pillar covers the inner component of described lower longeron and exterior part both sides' outside face with its lower end side engages with lower longeron,

Described lower longeron possesses: closed section parts, thus a blank plate is configured as to tubular and both ends are engaged and form closed section, and the flange part consisting of described both ends is configured in car inner side; Strengthening part, in the inside of these closed section parts, this strengthening part is at least disposed at and engages the region that has described center pillar, and installs in the mode that the relative longitudinal wall of described closed section parts is connected.

2. Vehicular side body structure as claimed in claim 1, is characterized in that, the flange part of the described car inner side of described closed section parts engages with base plate.

3. Vehicular side body structure as claimed in claim 1 or 2, is characterized in that, described center pillar is overlapping with respect to the engage position of described closed section parts with respect to engage position and the described strengthening part of described closed section parts.