CN1891554A - Underbody structure of sliding-door vehicle - Google Patents

Abstract

The present invention provides a lower vehicle body structure for a slide door vehicle. The lower vehicle body structure comprises a lower side sill which extends along the back and forth direction of the vehicle at the inferior border of the side door peristome and is composed of a lower side sill internal component and a lower side sill exterior component, wherein the lower side sill exterior component forms a guide track holder for holding the lower guide track supporting the lower part of the slide door; the lower side sill internal component forms a protrudent part projecting to the inner side of the vehicle so as to form the guide track holder; a bottom board of the vehicle chamber floor is formed by binding with the lower part of the lower side sill; a middle reinforcement rib is formed on the bottom board, which extends along the back and forth direction of the vehicle at the central part of the width direction of the vehicle and upheaves upwards; a beam extends along the width direction of the vehicle on the bottom board and connects the protrudent part and the middle reinforcement rib. By adopting the lower vehicle body structure, a spacious vehicle chamber space can be ensured; the lateral stiffness of the lower side sill can be further improved, so as to bear the impact load acting at the side surface of the vehicle body practically.

Description

Underbody structure with vehicle of sliding door

Technical field

The present invention relates to the underbody structure of a kind of side door (side door), relate in particular to a kind of underbody structure that has improved the vehicle with sliding door of reply side impact load rigidity for the vehicle of sliding door (among the present invention, abbreviating the sliding door vehicle as).

Background technology

In the past, single case automobile (one box car), miniature box car vehicles such as (Minivan), its side door adopts sliding door.The vehicle of above-mentioned employing sliding door, its bottom of door is supported by the following side bar that extends along the vehicle fore-and-aft direction.

When bottom of door was supported on down on the side bar, part formed the guide rail resettlement section of caving in to vehicle interior side outside following side bar usually.

Yet above-mentioned down side bar is the significant points of support side impact load in body structure, if form above-mentioned guide rail resettlement section, its lateral rigidity will significantly descend and abundant support side impact load, thereby may cause its bending to the inside.

For this reason, patent documentation 1 (Japanese Patent open communique spy open 2005-1473 number) discloses following structure, by will be engaged in the protrusion of the overall width direction medial eminence of side bar internals downwards along the crossbeam that the overall width direction is extended for the formation of guide rail resettlement section, and by this crossbeam being engaged in the frame parts that extends along the vehicle fore-and-aft direction, to improve the lateral rigidity of side bar down, prevent following beam deflection.In addition, above-mentioned crossbeam, frame parts are arranged on the lower surface of base plate.

Yet if from guaranteeing the viewpoint in well-to-do space, car chamber, the base plate of car chamber is preferably disposed on lower position.But, with regard to following side bar, can not be arranged on low position for avoiding interfering then with the road surface.Therefore, prevent to interfere in the vehicle of guaranteeing space, car chamber again both considering, can consider to descend the set positions of side bar in the position that is higher than base plate with the road surface.

Certainly, even in this case, if side door is a sliding door, as mentioned above, the rigidity of following side bar also can descend, but, because the position of following side bar is higher than base plate, therefore can't utilize the crossbeam and the frame parts that are engaged in the base plate lower surface as above-mentioned Japanese documentation 1, improve the lateral rigidity of side bar down.

In addition, adopt the structure of patent documentation 1, also can consider by crossbeam and frame parts being bonded on the upper surface of base plate, improve the rigidity of side bar down, but, if will be bonded on the base plate along the frame parts that the vehicle fore-and-aft direction extends, then reduce base plate with guarantee well-to-do space, car chamber aspect can be affected.

In addition, if frame parts merely is bonded on the base plate, when bigger side impact load is imported, can not fully support this side impact load.

Summary of the invention

The object of the present invention is to provide a kind of side door is the underbody structure of the vehicle of sliding door.Adopt the underbody structure of this vehicle,, can guarantee well-to-do space, car chamber, can further improve down the lateral rigidity of side bar simultaneously, thereby can bear the side impact load that acts on vehicle effectively by descending side bar to be set in to be higher than the position of base plate.

Bottom section of body with vehicle of sliding door of the present invention, be included in the following side bar that the lower edge of the side door peristome of vehicle body extends along the vehicle fore-and-aft direction, this time side bar is made of the outer part of side bar under the side bar internals reach down, the outer part of wherein above-mentioned side bar down is formed with the guide rail resettlement section of accommodating the lower guideway that supports the sliding door bottom, and above-mentioned side bar internals down are formed with for the formation of above-mentioned guide rail resettlement section to the protrusion of vehicle interior side protuberance; Engage with the above-mentioned bottom of side bar down, constitute the base plate on floor, car chamber; Be formed on the above-mentioned base plate, extend and the middle strengthening rib of protuberance upward along the vehicle fore-and-aft direction at the central part of overall width direction; Extend in base plate upper edge overall width direction, and connect the crossbeam of above-mentioned protrusion and above-mentioned middle strengthening rib.

Adopt this structure because following formed protrusion and be formed on middle strengthening rib on the base plate on the side bar internals connected by the crossbeam that extends along the overall width direction, thereby can utilize existing in the middle of strengthening rib, the lateral rigidity of side bar under improving.Therefore, can effectively utilize the existing middle strengthening rib that swells upward at overall width direction central part, improve the lateral rigidity of the following side bar that is positioned at the base plate top.Particularly because crossbeam is engaged in down the protrusion of side bar, thus can be in the position that is subjected to the side impact load effect most of descending side bar bearing load effectively.Therefore, even the position that will descend side bar to be set in to be higher than base plate also can further improve down the lateral rigidity of side bar, thereby can support the side impact load that acts on vehicle to guarantee well-to-do space, car chamber infalliblely.

In addition, above-mentioned crossbeam, as long as can extend and connection protrusion and middle strengthening rib in base plate upper edge overall width direction, it also can adopt closed sectional member, open section member, cylindrical member etc., does not therefore have special the restriction.

In above-mentioned underbody structure, the height of middle strengthening rib can be higher than following depth of beam.

Adopt this structure, be higher than following depth of beam owing to bear the height of the middle strengthening rib of side impact load, therefore, middle strengthening rib can be given full play to its rigidity that can bear side impact load infalliblely.Therefore, can further improve down the lateral rigidity of side bar, prevent following deflection of beam infalliblely.

In above-mentioned underbody structure, the above-mentioned top of side bar down, joint has the pillar that extends along the vehicle above-below direction, constitute the bottom of pillar internals of the part of this pillar, be provided with to overall width direction center side and extend, to cover the extension of above-mentioned protrusion, this extension combines with above-mentioned crossbeam.

Adopt this structure,, be arranged on the pillar with the extension that covers protrusion, and combine, therefore can utilize the rigidity of pillar to suppress the displacement of protrusion, thereby can improve the lateral rigidity of side bar down to vehicle interior side with crossbeam owing to extend to overall width direction center side.In addition, owing to pillar is bonded on the crossbeam, thereby when being subjected to side impact load, the pillar bottom also will be suppressed to moving of overall width direction inboard, therefore also can prevent the distortion of pillar self.

In underbody structure of the present invention, above-mentioned extension may extend to the side of above-mentioned protrusion.

Adopt this structure, extension not only can bear down the side impact load of side bar, also can bear the side impact load from sliding door, and its result can further improve down the rigidity of side bar.

In above-mentioned underbody structure, the position that overlaps with above-mentioned crossbeam is seen from the side-looking direction in the below of the above-mentioned guide rail resettlement section in the above-mentioned protrusion, is provided with the strengthening part that extends along the overall width direction.

Adopt this structure, owing to be provided with the strengthening part that extends along the overall width direction below the above-mentioned guide rail resettlement section in above-mentioned protrusion, overlap so that it is seen with above-mentioned crossbeam from the side-looking direction, therefore, load when side collision takes place is directly delivered to crossbeam through strengthening part.In addition, owing to this crossbeam engages with crash-resistant middle strengthening rib, thereby the rigidity of support of crossbeam also is enhanced.Therefore, when vehicle generation side collision, no matter the distortion of protrusion etc. how, also can be delivered to crash-resistant crossbeam with side impact load infalliblely.Therefore, by engaging with the protrusion of following side bar, not only can improve the lateral rigidity of side bar down, but also can bear the side impact load that acts on vehicle infalliblely along the crossbeam that the overall width direction is extended.

In addition, above-mentioned strengthening part as long as can extend in the overall width direction, also can adopt the member with cap shape section, also can adopt the member with " L " shape section, so there is not special restriction.

In above-mentioned underbody structure, above-mentioned crossbeam is made of the member that section roughly is the cap shape, the flange (flange) of the vehicle fore-and-aft direction both sides of this crossbeam is bonded on the upper surface of above-mentioned base plate, the top height of this crossbeam is arranged on the height that crossbeam and above-mentioned strengthening part sidepiece are faced mutually.

Adopt this structure, be bonded on the base plate because section roughly is the crossbeam of cap shape infalliblely, the top height of this crossbeam is arranged on the height that the crossbeam and the sidepiece of strengthening part are faced mutually, therefore, by the highest position of buckling strength on the crossbeam, can bear from side impact load the side impact load of direct acting strengthening part.Therefore, strengthening part and crossbeam can be used as and improve the parts of the lateral rigidity of side bar down, are utilized effectively.Therefore, can improve the anti-bending effect of side bar down infalliblely.

In above-mentioned underbody structure, above-mentioned strengthening part is by the hypocrateriform component set-up that extends along the overall width direction.

Adopt this structure, because strengthening part is hypocrateriform, therefore, this strengthening part is firmer, thereby can make the side impact load that is input to down side bar be delivered to crossbeam infalliblely.Like this, side impact load can be delivered to crossbeam more infalliblely, thereby can further improve down the lateral rigidity of side bar.Therefore, can further improve the vehicle generation side collision anti-bending effect of side bar at present.

In above-mentioned underbody structure, above-mentioned strengthening part engages with the bottom surface of guide rail resettlement section.

Adopt this structure, can improve guide rail resettlement section self rigidity by strengthening part.Therefore, can improve the rigidity of support of guide rail resettlement section to sliding door.In addition, because strengthening part needn't engage with the outer part of following side bar etc., so can not destroy down the aesthetic appearance of side bar.

In above-mentioned underbody structure, the above-mentioned bottom of side bar internals down is provided with the junction surface that engages with base plate, so that above-mentioned protrusion is given prominence to directly over above-mentioned base plate.

Adopt this structure, because under protrusion, be positioned at down that the bottom of side bar internals is provided with the junction surface that engages with base plate, even, side bar is engaged with base plate therefore not at the outer rim formation of base plate recess corresponding to protrusion.Therefore, need not on base plate, to form recess, can constitute base plate with simple shape (for example linearity), thereby can improve the commonality of base plate corresponding to protrusion.In addition, because base plate is bonded on down the bottom of side bar internals, therefore, the position of base plate can be set lowlyer, and can enlarge space, car chamber.Therefore,, can not make the sealing property deterioration between base plate and the following side bar even protrusion to the medial eminence of overall width direction is set in following side bar internals yet, and simply moulding, assembling operation, thereby raising forming characteristics and assembling operation performance.

In above-mentioned underbody structure, between above-mentioned protrusion and the above-mentioned base plate, be provided with the support component that supports above-mentioned protrusion.

Adopt this structure and since protrusion through supporting units support on base plate, thereby can limit the displacement of the protrusion that is one-sided holding state at above-below direction infalliblely.Therefore, protrusion is enhanced at the anti-load performance of above-below direction, even effect has from the weight of the sliding door of guide rail resettlement section etc., protrusion can not shake yet.Therefore, even protrusion is one-sided holding state, its rigidity also can be improved.

In above-mentioned underbody structure, above-mentioned support component is by constituting from the outstanding upward protrusion of above-mentioned base plate.

Adopt this structure, because by supporting protrusion from the outstanding upward protrusion of base plate, therefore, protrusion is by backplanes support.Therefore, the protrusion of one-sided holding state can become one with base plate infalliblely, to improve intensity.

In above-mentioned underbody structure, above-mentioned base plate be positioned near the protrusion position, be equipped with spot welding and use the operation hole, between this operation hole and the protrusion, be provided with the parts that roughly are the cap shape, this upper end that roughly is the parts of cap shape engages with protrusion, its bottom be bonded on above-mentioned operation hole around.

Adopt said structure, base plate is equipped with spot welding and uses the operation hole, uses the operation hole by this spot welding, and the parts that roughly are the cap shape that are arranged between protrusion and the base plate are engaged.Therefore, base plate self even directly do not form the support portion, also can support protrusion by engaging the parts that roughly are the cap shape.Therefore, the base plate of same shape also can be used for non-sliding door, promptly has the vehicle of general swing door (swing door), thus base plate can and have at vehicle with sliding door give between the vehicle of swing door general.

In above-mentioned underbody structure, above-mentioned support component is made of the overall width direction outside portion of above-mentioned crossbeam.

Adopt said structure, by extending, and connect the overall width direction outside portion of the crossbeam of above-mentioned protrusion and middle strengthening rib, protrusion is supported on the base plate along the overall width direction.Therefore, improve the parts of the lateral rigidity of side bar down by effectively utilizing, that is crossbeam, also can limit the above-below direction displacement of protrusion.Therefore, both can obtain to prevent the effect of following beam deflection, can improve the intensity of the above-below direction of protrusion again.

In above-mentioned underbody structure, above-mentioned crossbeam, has the overall width direction outside portion that combines with above-mentioned protrusion bottom surface, and more be positioned at overall width direction central authorities one side than protrusion, more to the outstanding overall width direction inside portion of short transverse, wherein overall width direction inside portion is faced mutually with the sidepiece of above-mentioned protrusion than overall width direction outside portion.

Adopt said structure, both can suppress protrusion displacement to the car indoor when side collision takes place infalliblely, can pass through overall width direction outside portion again, suppress the displacement of protrusion on above-below direction by the overall width direction inside portion of crossbeam.Therefore, by the mono-crossbeam, can suppress bending and protrusion the displacement on above-below direction of side bar when side collision takes place down respectively in infallible ground, thereby can improve the integral rigidity of side bar down.

In above-mentioned underbody structure, the upper surface of above-mentioned crossbeam is formed with the dip plane from its overall width direction outside portion to overall width direction inside portion, on this dip plane, is provided with when vehicle generation side collision and the butt parts of above-mentioned protrusion butt.

Adopt this structure, owing to be provided with the butt parts, therefore, the impact to crossbeam that is produced when side collision takes place will be transmitted by the butt parts more infalliblely.Therefore, even make impact be difficult to be delivered to face on the crossbeam because of the overall width direction inside portion of crossbeam is different with the height of overall width direction outside portion, side load also can be delivered to crossbeam by the butt parts infalliblely, thereby can prevent following deflection of beam.

In above-mentioned underbody structure, above-mentioned crossbeam be arranged on above-mentioned protrusion in the height faced mutually of the sidepiece of the guide rail resettlement section of being accommodated.

Adopt this structure,, therefore, can support the side impact load that acts on the guide rail resettlement section infalliblely from sliding door by crossbeam because the sidepiece in the guide rail resettlement section is set side by side with crossbeam.Like this, also can bear the side impact load that acts on sliding door by crossbeam.Thus, can improve the anti-bending effect of side bar down.

In above-mentioned underbody structure, above-mentioned crossbeam, the member that roughly is the cap shape by section constitutes.

In addition, in above-mentioned underbody structure, above the above-mentioned crossbeam, be arranged on the height that the crossbeam and the sidepiece of above-mentioned protrusion are faced mutually.

Adopt said structure, be bonded on the base plate because section roughly is the crossbeam of cap shape infalliblely, and above this crossbeam, be arranged on the height that the crossbeam and the sidepiece of protrusion are faced mutually, therefore, can bear the protrusion that is subjected to the side impact load effect most by the highest position of buckling strength of crossbeam.Therefore, the parts of the lateral rigidity of side bar were utilized effectively under crossbeam can be used as and improves.Thus, can improve the anti-bending effect of side bar down effectively.

In above-mentioned underbody structure, above the above-mentioned base plate, be arranged on the height that the crossbeam and the sidepiece of guide rail resettlement section are faced mutually.

Adopt this structure, be bonded on the base plate because section roughly is the crossbeam of cap shape infalliblely, and above the base plate, be arranged on the height that the crossbeam and the sidepiece of guide rail resettlement section are faced mutually, therefore, the load by the guide rail resettlement section that produces from the side impact load of sliding door is born at the highest position of buckling strength that can be by crossbeam.Therefore, the parts of the lateral rigidity of side bar were utilized effectively under crossbeam can be used as and improves.Thus, can improve the anti-bending effect of side bar down effectively.

In above-mentioned underbody structure, near above-mentioned crossbeam and the junction surface that above-mentioned protrusion engages, be provided with the load-carrying element of strengthening in this crossbeam inside.

Adopt this structure, owing near crossbeam and junction surface that protrusion engages, be provided with load-carrying element, thereby near the rigidity in the junction surface of crossbeam is enhanced.Therefore, the buckling strength of its reply can be improved, and the anti-bending effect of side bar down can be improved from the side impact load of protrusion.

Description of drawings

Fig. 1 is the overall perspective view of the related vehicle of the 1st embodiment of the present invention.

Fig. 2 is the birds-eye view of the centre portion of the related underbody structure of the 1st embodiment of the present invention.

Fig. 3 is related following side bar of the 1st embodiment of the present invention seen from the place ahead, the vehicle body outside and near block diagram thereof.

Fig. 4 is related following side bar of proceeds posterolateral is seen in the vehicle body the 1st embodiment of the present invention and near block diagram thereof.

Fig. 5 is the A-A line direction cutaway view of Fig. 2.

Fig. 6 is the related following side bar in-to-in amplification view of the 1st embodiment of the present invention.

Fig. 7 is related following side bar of proceeds posterolateral is seen in the vehicle body the 2nd embodiment of the present invention and near block diagram thereof.

Fig. 8 is the related following side bar in-to-in amplification view of the 2nd embodiment of the present invention.

Fig. 9 is the related following side bar in-to-in amplification view of the 3rd embodiment of the present invention.

Figure 10 is the single-piece block diagram of the related load-carrying element of the 3rd embodiment of the present invention.

Figure 11 is the birds-eye view of the centre portion of the related underbody structure of the 4th embodiment of the present invention.

Figure 12 is related following side bar of the 4th embodiment of the present invention seen from the place ahead, the vehicle body outside and near block diagram thereof.

Figure 13 is near the block diagram the related following side bar of proceeds posterolateral is seen in the vehicle body the 4th embodiment of the present invention.

Figure 14 is the A-A line cutaway view of Figure 11.

Figure 15 is the B-B line cutaway view of Figure 11.

Figure 16 is the related following side bar in-to-in amplification view of the 4th embodiment of the present invention.

Figure 17 is the single-piece block diagram of the related hypocrateriform strengthening part of the 4th embodiment of the present invention.

Figure 18 is the related cutaway view of the 5th embodiment of the present invention, and is corresponding with Figure 14.

Figure 19 is the related cutaway view of the 5th embodiment of the present invention, and is corresponding with Figure 15.

Figure 20 is the exploded perspective view of the related underbody structure of the 6th embodiment of the present invention.

Figure 21 is related following side bar of proceeds posterolateral is seen in the vehicle body the 6th embodiment of the present invention and near block diagram thereof.

Figure 22 is the related following side bar in-to-in cutaway view of the 6th embodiment of the present invention.

Figure 23 is the related following side bar in-to-in amplification view of the 6th embodiment of the present invention.

Figure 24 is the exploded perspective view of the related underbody structure of the 7th embodiment of the present invention.

Figure 25 is the related following side bar in-to-in amplification view of the 7th embodiment of the present invention.

Figure 26 is related following side bar of proceeds posterolateral is seen in the vehicle body the 8th embodiment of the present invention and near block diagram thereof.

Figure 27 is the related following side bar in-to-in amplification view of the 8th embodiment of the present invention.

Figure 28 is related following side bar of proceeds posterolateral is seen in the vehicle body the 9th embodiment of the present invention and near block diagram thereof.

Figure 29 is the related following side bar in-to-in amplification view of the 9th embodiment of the present invention.

The specific embodiment

Below, describe embodiments of the present invention with reference to the accompanying drawings in detail.But, in following each illustrated embodiment, identical parts are paid prosign, omit repeat specification.

(the 1st embodiment)

As shown in Figure 1, adopt the related vehicle V of the 1st embodiment of the present invention, for open and close the structure of the stopping port 1 of back seat by sliding door 2, the purline of body structure (roofside rail) 3, down side bar 4 and rear side coaming plate (rear fender) 5 are respectively arranged with the sliding door guide rail 6 of the roller (roller) (not shown) of this sliding door 2 of guiding.

In addition, between purline 3 and the following side bar 4, vertical upright being provided with extended and both are connected with this along the vertical direction, and separates the B post (center pillar) 7 of front stall stopping port and back seat stopping port 1.

As shown in Figure 2, the bottom section of body of vehicle V is as follows, the left and right sides is provided with the following side bar 4,4 that extends along the vehicle fore-and-aft direction, open the base plate 9 that the central part be provided with in the overall width direction is formed with the middle strengthening rib 8 that extends along the vehicle fore-and-aft direction of protuberance upward between this time side bar 4,4, the upper surface of this base plate 9, respectively be provided with the interval of regulation at the vehicle fore-and-aft direction and a pair ofly extend, and connect the double-type crossbeam 10 in the left and right sides and 11 of side bar 4 and middle strengthening rib 8 down respectively along the overall width direction.Wherein, the crossbeam that is positioned at the place ahead is arranged on the front cross rail 10 of front stall below, and the crossbeam that is positioned at the rear is arranged near the connection crossbeam 11 in B post 7 positions.

As shown in Figure 3, B post 7 is the hollow structures that are pipeline (duct) shape that have the outer part 72 of the pillar of being located at the overall width direction outside (integrally formed with the outer part 42 of following side bar) and be located at the pillar internals 71 of overall width direction inboard.Pillar internals 71 and the outer part 72 of pillar have the flange that is respectively formed at vehicle fore-and-aft direction two ends, are joined so one by these flanges.

Among Fig. 3 45 is the pillar reinforcements (pillar reinforcement) that extend along the vertical direction in B post 7 inside, the 46th, and the following side bar reinforcement (side sill reinforcement) that extends along the vehicle fore-and-aft direction in following side bar 4 inside.In addition, between the outer part 72 of pillar and pillar reinforcement 45 and the pillar internals 71, be provided with and strengthen B post 7 in-to-in brace panels 73, this brace panel 73 is along the extension of overall width direction and connect (with reference to Fig. 6) such as above-mentioned pillar reinforcement 45 and pillar internals 71.

Above-mentioned down side bar 4, be have by upper limb and lower edge and engaged be positioned at the following side bar internals 41 of overall width direction inboard and be positioned at the overall width direction outside the outer part 42 of following side bar be the hollow structure that pipe is led shape.As shown in Figure 2, near the bottom of the B post 7 of following side bar internals 41, be formed with protrusion 44 to the vehicle interior side protuberance.

As Fig. 3 to shown in Figure 6, this time side bar 4, be formed with from the bottom of protrusion 44 B post 7 in opposite directions near to the resettlement section 43 of vehicle rear-side direction extension.This resettlement section 43 is formed on down on the outer part 42 of side bar, is separated by the opening 43a that is long hole shape that extends along the vehicle fore-and-aft direction.This opening 43a is provided with guide rail bracket 43b.This guide rail bracket 43b, prominent to overall width direction inboard, form in the overall width direction outside and open, and section (channel) roughly in the form of slot.

The overall width direction of guide rail bracket 43b outside upper limb is engaged in the junction surface of brace panel 73 lower ends.

The overall width direction outside lower edge of guide rail bracket 43b is engaged in strengthening part 47.This strengthening part 47, with the together edge vehicle body fore-and-aft direction extension of side bar 4 down of the outer part 42 of following side bar, to strengthen side bar 4 down, its upper limb, as mentioned above, be engaged in down the overall width direction outside lower edge of outer part 42 of side bar and guide rail bracket 43b, simultaneously its lower edge, with by the side bar internals 41 and the state of the flange clamping of each lower edge of the outer part 42 of side bar down down, be bonded into one.

The inboard lower surface of the overall width direction of guide rail bracket 43b is provided with corner plate (gusset) 48.This corner plate 48, its upper limb are engaged in the overall width direction medial surface of guide rail bracket 43b, and its lower edge is engaged in strengthening part 47.

The end face of guide rail bracket 43b is provided with the sliding door lower guideway 61 that supports sliding door 2 bottoms.The leading section of this sliding door lower guideway 61 has the 61a of introducing portion that enters protrusion 44.The 61a of this introducing portion is curved shape, so that the leading section of sliding door lower guideway 61 more is positioned at overall width direction inboard than its rear, thereby sliding door 2 is being positioned under the state of front end, is introduced into overall width direction inboard, to close stopping port 1.

Base plate 9, by its outboard flanges 91 being engaged in down the bottom of side bar 4, particularly, for being engaged in down the longitudinal wall part lower end of side bar internals 41, to constitute floor, car chamber.Like this, by base plate 9 being arranged on down the bottom of side bar 4,, thereby guarantee well-to-do space, car chamber as much as possible with reduction floor, car chamber.

The position with respect to protrusion 44 of base plate 9 carries over the shape of protrusion 44 and is the recessed profile of part.

In addition, in order to reduce actual height of floor from rail top as far as possible, the circumferential edges of base plate 9 is formed with the stage portion 92 that more is positioned at downside than outboard flanges 91.

In addition, the central part of this base plate 9 as mentioned above, is formed with the middle strengthening rib 8 that extends along the vehicle fore-and-aft direction.This centre strengthening rib 8, inner and be formed on the overall width direction central part of base plate 9 for vehicle components (not shown) such as freeing pipe, transmission shaft being housed in it.In addition, by forming this centre strengthening rib 8, with the face rigidity of raising base plate 9, thereby the integral rigidity of raising vehicle body particularly improves its torsion rigidity.

Connect crossbeam 11, between the protrusion 44 and middle strengthening rib 8 of side bar 4 down, connect these both and extend along the overall width direction.Particularly, this connects crossbeam 11, is arranged on the base plate 9, is set up in down between the side 8a of the medial surface 44a of protrusion 44 of side bar 4 and middle strengthening rib 8.

In addition, the height H 1 of middle strengthening rib 8 is set at the height H 2 that is higher than following side bar 4.Therefore, middle strengthening rib 8 self rigidity are higher than the rigidity of side bar 4 down.

This connects crossbeam 11, and as shown in Figure 4, the member that roughly is the cap shape by section constitutes, and its two side flange 11a is bonded on the upper surface of base plate 9; Upward and front and back the end flange 11b, the 11b that extend, be engaged in down the medial surface 44a of the protrusion 44 of side bar 4; The side 8a of strengthening rib 8 in the middle of inner end flange 11c (with reference to Fig. 5) is engaged in.Like this, connect crossbeam 11, be engaged with down between the protrusion 44 and middle strengthening rib 8 of side bar 4 infalliblely.

In addition, connect the top 11d of crossbeam 11, as shown in Figure 5, its height h is set at the height roughly the same with the height and position of guide rail bracket 43b, coincides so that both see from the side-looking direction.

Below, the bottom section of body of present embodiment with said structure loading transfer when the vehicle generation side collision is explained.

In the vehicle that possesses as the sliding door 2 of the 1st embodiment, owing to be provided with sliding door 2, therefore as mentioned above, be necessary to form guide rail resettlement sections 43, thereby reduced the closing face of time side bar 4 at side bar 4 down, the lateral rigidity of side bar 4 is declined to a great extent.

Therefore, do the time spent when side impact load produces from vehicular sideview, following side bar 4 can be to the vehicle interior side bending.

Yet, in the present embodiment, since by the connection crossbeam 11 that extends along the overall width direction make down the protrusion 44 of side bar 4 be connected in the middle of strengthening rib 8, thereby connect 11 pairs of side impact load of crossbeam and supported, thereby make middle strengthening rib 8 bear this side impact load.Therefore, the lateral rigidity of following side bar 4 is enhanced, and above-mentioned bending to vehicle interior side is suppressed.Particularly, because in the position that protrusion 44 is subjected to the side impact load effect most, engaging has the crossbeam 11 of connection, therefore, can bear side impact load effectively.

In addition, owing to utilize the higher middle strengthening rib 8 of rigidity, bear side impact load effectively, therefore can reduce the distortion of side bar 4 when side collision takes place down as much as possible, even be formed with the guide rail resettlement section at following side bar 4, also can make down the decline of the lateral rigidity of side bar 4 be controlled at bottom line.

And, owing to set the height of this connection crossbeam 11, particularly, be the height h of top 11d, make to connect the sidepiece of crossbeam 11, therefore corresponding to guide rail bracket 43b, act on the side impact load of sliding door 2, also can pass through guide rail bracket 43b, be directly delivered to the high position of buckling strength that connects crossbeam 11, thereby the collision load that acts on sliding door 2 can be born by middle strengthening rib 8.

Owing to act on down the load of side bar 4 or sliding door 2 during vehicle generation side collision, by connecting crossbeam 11, therefore strengthening rib 8 in the middle of being delivered to can prevent down the bending of side bar 4, the load when bearing side collision effectively infalliblely.

Adopt the bottom section of body of the 1st embodiment, owing to be formed on down the protrusion 44 and the middle strengthening rib 8 that is formed on base plate 9 of side bar internals 41, connected by the connection crossbeam 11 that extends along the overall width direction, thereby strengthening rib 8 in the middle of can utilizing, the lateral rigidity of side bar 4 down improved.Therefore, can effectively utilize the existing middle strengthening rib 8 that extends along the vehicle fore-and-aft direction at overall width direction central part, raising is positioned at the lateral rigidity of the following side bar 4 of base plate 9 tops.

Particularly be engaged in protrusion 44 owing to connect crossbeam 11, thus can be at side bar 4 down be subjected to position that side collision carries effect bearing load securely most.Therefore, at side door is in the bottom section of body of vehicle V of sliding door 2, even the position that will descend side bar 4 to be set in to be higher than base plate 9 also can further improve down the lateral rigidity of side bar 4, thereby can bear the side impact load that acts on vehicle V effectively to guarantee well-to-do space, car chamber.

In addition, in the 1st embodiment, be higher than the height H 2 of side bar 4 down because the height H 1 of middle strengthening rib 8 is set at, thereby middle strengthening rib 8 can be brought into play the rigidity that it bears side impact load effectively.Therefore, the lateral rigidity of following side bar 4 is further enhanced, thereby can prevent down the bending of side bar 4 infalliblely.

In addition, in the 1st embodiment, connecting crossbeam 11 is made of the member that section roughly is the cap shape, and, the vehicle fore-and-aft direction two side flange 11a of this connection crossbeam 11 are bonded on the upper surface of base plate 9, and the top 11d of this connection crossbeam 11 is configured such that connecting crossbeam 11 faces mutually with the sidepiece of protrusion 44.Like this, because the high connection crossbeam 11 of buckling strength bears the side impact load from the protrusion 44 that is subjected to most the side impact load effect, therefore, the connection crossbeam 11 that section roughly can be the cap shape effectively utilizes as the parts that improve the lateral rigidity that descends side bar 4.

In addition, in the 1st embodiment, be set to face mutually owing to connect crossbeam 11, thereby act on the side impact load of guide rail bracket 43b, can be delivered to connection crossbeam 11 infalliblely from sliding door 2 with the sidepiece of guide rail bracket 43b.Therefore, connecting crossbeam 11 can play a role as the actv. pressure-containing parts at the side impact load that acts on sliding door 2.Like this, because connecting crossbeam 11 and middle strengthening rib 8 not only can be at the side impact load that acts on down side bar 4, also can play a role as actv. side collision supporting construction, therefore can further improve down the anti-bending effect of side bar 4 at the side impact load that acts on sliding door 2.

In addition, in the 1st embodiment, connecting crossbeam 11 is made of the member that section roughly is the cap shape, and, the vehicle fore-and-aft direction two side flange 11a of this connection crossbeam 11 are bonded on the upper surface of base plate 9, and the height h that connects the top 11d of crossbeam 11 is set at the height that this connection crossbeam 11 and the sidepiece of guide rail bracket 43b are faced mutually, like this, above the connection crossbeam 11 that buckling strength is higher, the load that affacts guide rail bracket 43b by the side impact load of sliding door 2 will be born.Therefore, the connection crossbeam 11 that section roughly can be the cap shape effectively utilizes as the parts that improve the lateral rigidity that descends side bar 4.Therefore, can improve the anti-bending effect of side bar 4 down effectively.

In addition, in the 1st embodiment, the outer part 42 of guide rail bracket 43b and following side bar is by different component set-ups, but, also can form recess at part 42 outside the side bar down, thereby be constituted as same parts.

In addition, connect the height and position of crossbeam 11, also can be set at the height and position that is lower than guide rail bracket 43b.

In addition, connect crossbeam 11, need only the protrusion 44 and the middle strengthening rib 8 of side bar 4 under base plate 9 upper edge overall width directions are extended and connected, so, it also can adopt section to be the member of " L " shape, the cylindrical member of member, section that section is flat column.

(the 2nd embodiment)

As shown in Figures 7 and 8, in the bottom section of body of the related vehicle V of the 2nd embodiment, the bottom of the pillar internals 71 of B post 7 is provided with the extension 170 that extends along overall width direction central authorities one side, by the protrusion 44 of this extension 170 to cover down side bar internals 41.That is,, and, improve the rigidity of the protrusion 44 of side bar internals 41 down with this by these extension 170 connection protrusion 44 and B posts 7 by the extension 170 that is provided with around protrusion 44 at B post 7.

The extension 170 of these pillar internals 71 lower ends, engaging has the end flange 11b that connects crossbeam 11, connects crossbeam 11 thereby be engaged in.Therefore, the side impact load that passes over from following side bar 4 also is delivered to B post 7.Like this, the rigidity that B post 7 is had also can improve the lateral rigidity of side bar 4 down.

Like this, adopt the 2nd embodiment, can utilize the rigidity of B post 7, suppress the displacement of protrusion 44, improve the lateral rigidity of side bar 4 down to vehicle interior side.In addition, B post 7 self also connects crossbeam 11 because its bottom is engaged in, thereby when bearing side impact load, move to overall width direction inboard the bottom that also can suppress B post 7, therefore, also can prevent the distortion of himself.

In addition, as can be seen from Figure 8, the extension 170 of the 2nd embodiment extends to the side of guide rail bracket 43b.Therefore, extension 170, the side impact load of not only bearing down side bar 4 is also born the side impact load from sliding door 2, and its result can further improve down the rigidity of side bar 4.

In addition, in the present embodiment, extension 170 is overlapped in protrusion 44, with the protrusion 44 that covers down side bar internals 41, but, the following side bar internals 41 of extension 170 present position parts might not be overlapping, also can omit the following side bar internals 41 of this part and constitute the part of protrusions 44 upsides by extension 170.

(the 3rd embodiment)

As Fig. 9 and shown in Figure 10, in the bottom section of body of the related vehicle V of the 3rd embodiment, connect near crossbeam 11 in-to-ins and the junction surface that protrusion 44 engages, be provided with carriage 200, with the junction surface of raising connection crossbeam 11 and near rigidity thereof as load-carrying element.That is, by carriage 200 is set, make junction surface and near rigidity thereof, the rigidity that likens the crossbeam when being provided with for single part to is higher, thus improved connect crossbeam 11 with respect to from the buckling strength of the side impact load of side bar 4 down.

This carriage 200 as shown in figure 10, is formed by sheet metal being bent to hook (hook) shape, and it has integratedly, is engaged in the end wall 201 of protrusion 44 sidepieces; From the top of end wall 201 to the opposition side right-angled bend of protrusion 44, and with the end face 202 of the lower surface engages that connects crossbeam 11; Extend downwards from the end with end wall 201 opposition sides of end face 202, between the supporting walls 203 that connects between crossbeam 11 and the base plate 9; From the bottom of supporting walls 203 to the opposition side right-angled bend of protrusion 44, and the base plate junction surface 204 that engages with the upper surface of base plate 9.

When this carriage 200 of assembling, at first make the end face 202 of carriage 200 and connect crossbeam 11 and carry out face joint (branch's assembling), make the base plate junction surface 204 that is engaged in the carriage 200 that connects crossbeam 11 then, mounting is in the upper surface of base plate 9.Afterwards, by opposite end wall 201 and following side bar internals 41 respectively such as not shown access hole, and base plate junction surface 204 and base plate 9 welded.

Like this, connect near crossbeam 11 in-to-ins and the junction surface that protrusion 44 engages, as shown in Figure 9,, can improve with respect to buckling strength from the load of vehicle side by joint analog bracket 200.Like this, adopt present embodiment, owing to connecting near crossbeam 11 and the junction surface that protrusion 44 engages, be provided with and connecting the carriage 200 that crossbeam 11 inside are strengthened, thereby can improve near the buckling strength in junction surface.Therefore, can bear the side impact load that passes over from the protrusion 44 of following side bar 4 effectively, simultaneously, also can improve the anti-bending effect of side bar 4 down by connecting crossbeam 11.

Particularly, connect crossbeam 11, but also be engaged in base plate 9 or following side bar internals 41, therefore, can improve junction surface and rigidity nearby thereof infalliblely by carriage 200 because carriage 200 not only is engaged in.

But, about the shape of carriage 200, be not to be only limited to this, if can improve the rigidity that connects crossbeam 11, also can adopt the carriage member that is box-like etc.

(the 4th embodiment)

To shown in Figure 16, in the bottom section of body of the related vehicle V of the 4th embodiment, following side bar 4 has hypocrateriform strengthening part 51 as Figure 11.This hypocrateriform strengthening part 51 is engaged in the bottom surface 50 of guide rail bracket 43b, and extends along the overall width direction.

As shown in figure 17, this hypocrateriform strengthening part 51 particularly, is formed by sheet metal is bent to hypocrateriform, has edge 51a, the 51b, 51c, the 51d that vertically erect.The edge 51a in the overall width direction outside and the edge 51b of overall width direction inboard have at the double-type junction surface 51e of vehicle fore-and-aft direction, and these junction surfaces 51e folds into and be engaged in the edge 51c of adjacency, the inboard of 51d.In addition, whole edge 51a, 51b, the upper end of 51c, 51d are equipped with the junction surface 51f that launches laterally.

This hypocrateriform strengthening part 51, owing to adopt the shape that surrounds four limits, therefore, its integral rigidity is than height when crossbeam adopts the section shape of hat, and except that the rigidity of overall width direction, the rigidity of vehicle fore-and-aft direction is also higher.Therefore, when suffering side impact load, not only can bear effectively from the impact load of positive side input but also can bear from oblique the place ahead effectively or the impact load of tiltedly rear input and do not produce distortion.

Like this, the hypocrateriform strengthening part 51 that rigidity is higher is engaged in the bottom surface 50 of guide rail bracket 43b, particularly, and for being engaged in overall width direction outboard end from guide rail bracket 43b bottom to (with reference to Figure 16) the overall width direction medial end.

In the 4th embodiment, as shown in figure 13, base plate 9 carries over the shape of protrusion 44 and is the recessed gabarit of part.

And, as shown in figure 15, connect the side 11e of crossbeam 11, in the overall width direction, remove and practise physiognomy externally with guide rail bracket 43b, also roughly face mutually with the sidepiece of hypocrateriform strengthening part 51.Therefore, from the load of vehicle side, all be directly delivered to connection crossbeam 11.

In the 4th embodiment, owing to be provided with the hypocrateriform strengthening part 51 that extends along the overall width direction in protrusion 44, therefore, side impact load is directly delivered to easily and connects crossbeam 11, thereby can bear side impact load infalliblely.

In addition, owing to utilize the higher middle strengthening rib 8 of rigidity, support side impact load infalliblely, therefore can improve the rigidity of side bar 4 down, and,, also can make down the decline of the lateral rigidity of side bar 4 be controlled at bottom line even be formed with guide rail resettlement section 43 at following side bar 4.Like this, since act on down during vehicle generation side collision side bar 4 or sliding door 2 etc. load, through tray type strengthening part 51, guide rail bracket 43b and connection crossbeam 11, be passed to crash-resistant middle strengthening rib 8, therefore, can prevent down the bending of side bar 4, the load when supporting side collision infalliblely infalliblely.

As mentioned above, adopt the bottom section of body of the 4th embodiment, owing to be provided with the tray type strengthening part 51 that extends along the overall width direction below the guide rail bracket 43b in protrusion 44, so that seeing and connect crossbeam 11 from the side-looking direction, it overlaps, therefore, side impact load during vehicle generation side collision is directly delivered to connection crossbeam 11 through hypocrateriform strengthening part 51.In addition, because this connection crossbeam 11 is engaged in crash-resistant middle strengthening rib 8, thereby the rigidity of support of connection crossbeam 11 also is enhanced.Therefore, when vehicle generation side collision, no matter the distortion of protrusion 44 etc. how, also can be delivered to side impact load crash-resistant connection crossbeam 11 infalliblely.Therefore, at side door is in the bottom section of body of vehicle V of sliding door 2, by being engaged in down the protrusion 44 of side bar 4 along the connection crossbeam 11 that the overall width direction is extended, not only can improve the lateral rigidity of side bar 4 down, but also can bear the side impact load that acts on vehicle V infallible and effectively.

But, tray type strengthening part 51, so long as extend and the member strengthened along the overall width direction in protrusion 44, except that being above-mentioned hypocrateriform, the member or the section that also can adopt section to be the cap shape is the member of " L " shape.

In addition, in the 4th enforcement side's example, because connecting crossbeam 11 is arranged at, see not only from the side-looking direction and to overlap with the hypocrateriform strengthening part 51 that is positioned at protrusion 44, and the position that overlaps with guide rail bracket 43b, therefore, connect crossbeam 11, not only can directly bear side impact load, but also can directly bear side impact load from guide rail bracket 43b from the hypocrateriform strengthening part 51 of direct transmission side impact load.Like this, by effectively utilizing guide rail bracket 43b, bigger side impact load can be directly delivered to connection crossbeam 11.Therefore, can pass through tray type strengthening part 51 and guide rail bracket 43b, side impact load is delivered to connection crossbeam 11, further improve the anti-bending effect of side bar 4 down.

In addition, in the 4th embodiment, by hypocrateriform strengthening part 51 being constituted the hypocrateriform that extends along the overall width direction, can make hypocrateriform strengthening part 51 firmer, thereby being delivered to infalliblely, the side impact load that is input to down side bar 4 connects crossbeam 11.Like this, side impact load can be passed to connection crossbeam 11 more infalliblely, thereby can further improve down the lateral rigidity of side bar 4.Therefore, can further improve the vehicle generation side collision anti-bending effect of side bar 4 at present.

In the 4th embodiment,, can improve guide rail bracket 43b self rigidity by hypocrateriform strengthening part 51 being engaged in the bottom surface 50 of guide rail bracket 43b.Therefore, can improve the rigidity of support of guide rail bracket 43b to sliding door 2.In addition, because hypocrateriform strengthening part 51 does not engage with the outer part 42 of following side bar, therefore, can not damage down the aesthetic feeling of the outward appearance of side bar 4.

(the 5th embodiment)

As shown in figure 18, in the bottom section of body of the related vehicle V of the 5th embodiment, the height of the top 111d of connection crossbeam 111 is lower than the height in the 4th embodiment, so that its height is roughly the same with the height of hypocrateriform strengthening part 51.Like this, not only can bear side impact load, but also can guarantee well-to-do space, car chamber by reducing the height that connects crossbeam 111 from tray type strengthening part 51.

Particularly, section roughly is the connection crossbeam 111 of cap shape, the flange 111a of its vehicle fore-and-aft direction both sides is bonded on the base plate 9, the overall width direction external side end flange 111b that it extends upward is engaged in the medial surface 44a of protrusion 44, the side 8a of strengthening rib 8 in the middle of its overall width direction medial extremity flange 111c is engaged in, same with the 4th embodiment, it extends between middle strengthening rib 8 and protrusion 44, and connects these both on the overall width direction.

And, connect the top 111d of crossbeam 111, as mentioned above, be arranged on the height roughly the same with hypocrateriform strengthening part 51, in addition, connect the side 111e of crossbeam 111, as shown in figure 19, roughly edge 51c and the 51d with hypocrateriform strengthening part 51 is corresponding.

By adopting the connection crossbeam 111 of above-mentioned setting, can make the height that connects crossbeam 111 be lower than height in the 4th embodiment.Like this, connect crossbeam 111 will be not can car indoor have bigger outstanding, thereby can effectively utilize the interior space of top.In addition, even above-mentioned connection crossbeam 111 is set lowlyer, because this connection crossbeam 111 is seen with hypocrateriform strengthening part 51 from the side-looking direction and is overlapped, therefore, when vehicle generation side collision, side impact load connects crossbeam 111 be delivered to from hypocrateriform strengthening part 51 infalliblely, and is supported by middle strengthening rib 8.Therefore, same with the 1st embodiment, also can prevent down the bending of side bar 4.

As mentioned above, adopt the 5th embodiment,, can bear effectively from by the side impact load of the direct acting tray type strengthening part 51 of side impact load by the top 111d of the highest connection crossbeam 111 of buckling strength.Therefore, tray type strengthening part 51 and connection crossbeam 111 can be used as and improve the parts of the lateral rigidity of side bar 4 down, are utilized effectively.Therefore, can improve the anti-bending effect of side bar 4 down infalliblely.

Particularly in the present embodiment, must be lower owing to connect the height setting of crossbeam 111, therefore can enlarge space, car chamber.

(the 6th embodiment)

As Figure 22 and shown in Figure 23, in the bottom section of body of the related vehicle V of the 6th embodiment, base plate 9, by its outboard flanges 91 being engaged in down the bottom of side bar 4, particularly, for being engaged in down the junction surface 49 that is positioned at protrusion 44 lower positions of side bar internals 41, make protrusion 44 and base plate 9 see and coincide from overlooking direction, constitute bottom, car chamber with this.Like this, by base plate 9 being engaged in down the bottom of side bar 4, reduce floor, car chamber, to guarantee well-to-do space, car chamber as far as possible.

In addition, in order to make actual base plate face lower as far as possible, the circumferential edges of base plate 9 is formed with than outboard flanges 91 and is positioned at the more stage portion 92 of downside.

As shown in figure 20, base plate 9, irrelevant with the shape of the protrusion 44 of following side bar 4, its side end 9a is linearly on the vehicle fore-and-aft direction.Because linearly, therefore, base plate 9 self can be constituted with the same shape of the base plate of common swing door vehicle, with the shared base plate of other car type.

In addition, because this side end 9a is linearly, therefore need not to consider the shape of protrusion 44, promptly method that can be same with common assembling joint method engages the junction surface 49 of descending side bar internals 41 simply.

As shown in figure 21, connect crossbeam 11, the member that roughly is the cap shape by section forms, and its two side flange 11a is bonded on the upper surface of base plate 9.In addition, the outboard flanges 11b that reaches the fore-and-aft direction extension upward is engaged in down the medial surface 44a of the protrusion 44 of side bar 4, the side 8a of strengthening rib 8 in the middle of medial flange 11c (with reference to Figure 22) is engaged in.Like this, connect crossbeam 11, be bonded on down between the protrusion 44 and middle strengthening rib 8 of side bar 4.

In the 6th embodiment, as shown in figure 20, because the side end 9a of base plate 9 is linearly, and protrusion 44 outstanding positions above it, therefore the bonding area of 9 pairs of following side bar internals 41 of base plate can be reduced, thereby the indoor sealing property of car can be improved.And, as shown in figure 21, because base plate 9 is engaged in down side bar internals 41, thereby protrusion 44 is one-sided holding state, but, owing to this protrusion 44 limits at the coupled crossbeam 11 of the displacement of above-below direction, thereby protrusion 44 can be firm by infallible ground in the position of above-below direction, therefore, can suppress rocking of protrusion 44.

As mentioned above, adopt the bottom section of body of the 6th embodiment, because the bottom of following side bar internals 41, be provided with protrusion 44 at junction surface 49 that above-below direction intersects and engages with the outboard flanges 91 of base plate 9, therefore, even, side bar 4 is engaged with base plate 9 at the recess of the side end 9a of base plate 9 formation corresponding to protrusion 44.Therefore, can be as in the past, constitute the side end 9a of base plate 9 with rectilinear form, by with identical in the past method, assembling engages base plate 9 and following side bar 4.Therefore, at side door is in the bottom section of body of vehicle V of sliding door 2, even protrusion 44 to the medial eminence of overall width direction is set in following side bar internals 41, sealing property between base plate 9 and the following side bar 4 is worsened, and can simplify moulding, assembling operation, thereby improve forming characteristics and assembling operation performance.In addition, owing to base plate 9 also is engaged in the bottom of following side bar internals 41, thereby the position that therefore can reduce base plate 9 can enlarge space, car chamber.

In addition, in the 6th embodiment, owing to protrude in the protrusion that is one-sided holding state 44 of base plate 9 tops, the medial surface of its overall width direction, that is the medial surface of the overall width direction of following side bar internals 41, coupled crossbeam 11 connects, thereby protrusion 44 can limit by coupled crossbeam 11 moving of above-below direction, therefore, also can strengthen protrusion 44.Therefore, by connecting crossbeam 11, can improve down side bar 44 because of forming the rigidity that guide rail resettlement section 43 or protrusion 44 are descended, thereby improve side bar 4 whole rigidity down.

(the 7th embodiment)

As shown in figure 25, in the bottom section of body of the related vehicle V of the 7th embodiment, be situated between between protrusion 44 and the base plate 9 Support bracket 100 is housed, so that support the protrusion 44 that is one-sided holding state by the base plate 9 of below.That is, by Support bracket 100, strengthen since base plate 9 be engaged in down side bar 4 the bottom and with the overslung protrusion 44 of one-sided holding state.

This Support bracket 100, particularly, as shown in figure 25, the support component that is the cap shape by section constitutes, and by flange portion 101 is bonded on base plate 9, is engaged in the bottom surface 44b of protrusion 44 with last facial 102, and is arranged between protrusion 44 and the base plate 9.

Particularly, on carrying out, during facial 102 joint, not only engage in order to make it, but also engage, the three is bonded together (long and short dash line among Figure 25 is represented spot welding welding gun G) by spot welding with the guide rail bracket 43b of guide rail resettlement section 43 with protrusion 44.

Like this, engage by assembling, Support bracket 100 can fully suppress protrusion 44 rocking on above-below direction, even the weight of sliding door 2 acts on protrusion 44, also can bear the load that is delivered to protrusion 44 effectively.In addition, in order to carry out spot welding, as shown in figure 24, the lower position part that is equivalent to protrusion 44 at base plate 9 wears porose 110.Thus, can easily engage Support bracket 100, protrusion 44 and guide rail bracket 43b three.

In addition, Support bracket 100 also can be used as protrusion and is integrally formed in base plate 9, to support protrusion 44.But, do like this, base plate 9 will be as the member of sliding door vehicle special use and the moulding that is stamped.For this reason, in the 7th embodiment, as shown in Figure 4, by with the base plate of the drawing of swing door automotive universal on, wear the hole 110 that is used to carry out the spot welding operation from the rear, to constitute for motor vehicle base plate 9 of sliding door.Thus, can make the base plate of the base plate of swing door vehicle and sliding door vehicle general.

In addition, because this hole 110 by complete closed, therefore can not make the indoor sealing property of car worsen by the Support bracket 100 that is bonded on base plate 9.

Adopt the 7th embodiment,, thereby can limit the displacement of protrusion 44 on above-below direction that is one-sided holding state infalliblely because protrusion 44 is supported in base plate 9 through Support bracket 100.Therefore, the anti-load performance of protrusion 44 on above-below direction is enhanced, even 43 effects have the weight etc. of sliding door 2 from the guide rail resettlement section, protrusion 44 can not shake yet.Even therefore protrusion 44 is one-sided holding state, its rigidity also can improve.

Particularly, in the 7th embodiment, because by supporting protrusion 44 from the outstanding upward Support bracket 100 that is provided with of base plate 9, therefore, protrusion 44 is just directly supported by base plate 9.Therefore, protrusion 44 can become one to improve intensity with base plate 9 infalliblely.

In addition, adopt the 7th embodiment, be equipped with the hole 110 that the spot welding operation is used,, the Support bracket 100 that is arranged between protrusion 44 and the base plate 9 is engaged by utilizing this hole 110 at base plate 9.Therefore, even directly do not form outstanding upward protrusion separately, also can support protrusion 44 by base plate 9 at base plate 9.Therefore, the base plate 9 of same shape also can be used for the vehicle that generally has swing door of non-sliding door, thus can be between sliding door vehicle and swing door vehicle general base plate 9.

(the 8th embodiment)

As Figure 26 and shown in Figure 27, in the related body bottom section structure of the 8th embodiment, by connecting the tight below that crossbeam 211 extends to protrusion 44, and by the bottom surface 44b of protrusion 44 is engaged with the upper surface of connection crossbeam 211, utilized as the support component of protrusion 44 thereby will connect crossbeam 211.

Particularly, the overall width direction outboard end 212 that connects crossbeam 211 is lower than overall width direction medial end 213, and the below that this overall width direction outboard end 212 is inserted protrusion 44, by to the bottom surface 44b of the top 212a of overall width direction outboard end 212 and protrusion 44, and the guide rail bracket 43b of guide rail resettlement section 43 carry out spot welding, connect base plate 9 and protrusion 44.

But, also at base plate 9 be equipped with spot welding and use operation hole 110 for being easy to carry out welding operation this moment.

In the 8th embodiment, the impact of the overall width direction when in order to support side collision taking place is set with spot welded solder joint SP at overall width direction two places.Like this, by utilizing the above-below direction position that connects crossbeam 211 restriction protrusions 44, need not to be provided with separately Support bracket 100 and also can support protrusion 44.

In addition, as shown in figure 27, because connecting the overall width direction medial end 213 of crossbeam 211 sets higherly, thereby can face mutually with the sidepiece of protrusion 44, therefore, protrusion 44 is to the displacement of overall width direction inboard in the time of can preventing side collision, thereby can prevent down the bending of side bar 4 when side collision takes place.

In the 8th embodiment, extend by utilizing in the overall width direction, connect the connection crossbeam 211 of protrusion 44 and middle strengthening rib 8, make protrusion 44 be supported in base plate 9.Therefore, improve the parts of the lateral rigidity of side bar 4 down by effectively utilizing, that is connect crossbeam 211, the above-below direction position that also can limit protrusion 44.Therefore, both can obtain down the anti-bending effect of side bar 4, can improve the intensity of the above-below direction of protrusion 44 again.

In addition, in the 8th embodiment, both can suppress protrusion 44 displacement to the car indoor when side collision takes place by connecting the overall width direction medial end 213 of crossbeam 211 infalliblely, can pass through overall width direction outboard end 212 again, suppress the displacement of protrusion 44 on above-below direction.Therefore, connect crossbeam 211 by mono-, can infallible ground suppress respectively side bar 4 down when side collision takes place bending and protrusion 44 in the displacement of above-below direction, thereby can improve the integral rigidity of side bar 4 down.

(the 9th embodiment)

As Figure 28 and shown in Figure 29, the 9th embodiment is on the basis of the structure of the 8th embodiment, is connecting the structure that crossbeam 211 is provided with butt carriage 300 again.This butt carriage 300 can bear when side collision takes place from the impact to connection crossbeam 211 of side bar 4 or protrusion 44 down infalliblely.

Particularly, connect crossbeam 211, be formed with the inclination face 214 that tilts to overall width direction medial end 213 from overall width direction outboard end 212 upward, this inclination facial 214 engages to have and is flexed into the butt carriage 300 that is roughly the triangular prism shape, and the outer side surface 301 of this butt carriage 300 is faced mutually with protrusion 44.

Like this, by butt carriage 300 is set, even the enormous impact to connecting crossbeam 211 during owing to the generation side collision is partly peeled off spot welding, also can be through butt carriage 300, thereby bear the load that is delivered to protrusion 44 by connecting crossbeam 211 by base plate 9 more infalliblely, suppress the bending of side bar 4 down infalliblely.

Like this, in the 9th embodiment, owing to be provided with butt carriage 300, therefore, the impact to connection crossbeam 211 when side collision takes place will be transmitted by butt carriage 300 more infalliblely.Therefore, even it is different with the height of overall width direction outboard end 212 to connect the overall width direction medial end 213 of crossbeam 211, side impact load also can be delivered to by the butt parts infalliblely and connect crossbeam 211, thereby can prevent down the bending of side bar 4.

But, the shape of this butt carriage 300 is not limited to the shape in the 9th embodiment, for example, can adopt from positive apparent direction and see the shape that is " ㄑ " shape or " T " shape.

(other variation)

The present invention is not limited to above-mentioned embodiment, can comprise the embodiment that all are applicable to the bottom section of body of the vehicle with sliding door.In the present embodiment, be that example is illustrated vehicle with miniature box car, but also can on vehicles such as car or automobile wagon, implement the present invention.In addition, also can on the astelic vehicle that has removed the B post, implement the present invention.

Claims (20)

1. the bottom section of body with vehicle of sliding door is characterized in that, comprising:

The following side bar that extends along the vehicle fore-and-aft direction at the lower edge of the side door peristome of vehicle body, this time side bar is made of the outer part of side bar under the side bar internals reach down, the outer part of wherein above-mentioned side bar down is formed with the guide rail resettlement section of accommodating the lower guideway that supports the sliding door bottom, and above-mentioned side bar internals down are formed with for the formation of above-mentioned guide rail resettlement section to the protrusion of vehicle interior side protuberance;

Engage with the above-mentioned bottom of side bar down, constitute the base plate on floor, car chamber;

Be formed on the above-mentioned base plate, extend and the middle strengthening rib of protuberance upward along the vehicle fore-and-aft direction at the central part of overall width direction;

Extend in base plate upper edge overall width direction, and connect the crossbeam of above-mentioned protrusion and above-mentioned middle strengthening rib.

2. the bottom section of body with vehicle of sliding door according to claim 1 is characterized in that:

Strengthening rib in the middle of above-mentioned, it highly is higher than above-mentioned following depth of beam.

3. the bottom section of body with vehicle of sliding door according to claim 1 is characterized in that:

The above-mentioned top of side bar down, engaging has the pillar that extends along the vehicle above-below direction,

Constitute the bottom of pillar internals of the part of above-mentioned pillar, be provided with to overall width direction center side and extend, covering the extension of above-mentioned protrusion,

Above-mentioned extension engages with above-mentioned crossbeam.

4. the bottom section of body with vehicle of sliding door according to claim 3 is characterized in that:

Above-mentioned extension extends to the side of above-mentioned protrusion.

5. the bottom section of body with vehicle of sliding door according to claim 1 is characterized in that:

The position that overlaps with above-mentioned crossbeam is seen from the side-looking direction in the below of the above-mentioned guide rail resettlement section in the above-mentioned protrusion, is provided with the strengthening part that extends along the overall width direction.

6. the bottom section of body with vehicle of sliding door according to claim 5 is characterized in that:

Above-mentioned crossbeam, the member that roughly is the cap shape by section constitutes, and the flange joint of the vehicle fore-and-aft direction both sides of this crossbeam is at the upper surface of above-mentioned base plate, and the top height of this crossbeam is arranged on the height that crossbeam and above-mentioned strengthening part sidepiece are faced mutually.

7. the bottom section of body with vehicle of sliding door according to claim 5 is characterized in that:

Above-mentioned strengthening part is by the hypocrateriform component set-up that extends along the overall width direction.

8. the bottom section of body with vehicle of sliding door according to claim 5 is characterized in that:

Above-mentioned strengthening part engages with the bottom surface of above-mentioned guide rail resettlement section.

9. the bottom section of body with vehicle of sliding door according to claim 1 is characterized in that:

The above-mentioned bottom of side bar internals down is provided with the junction surface that engages with base plate, so that above-mentioned protrusion is given prominence to directly over above-mentioned base plate.

10. the bottom section of body with vehicle of sliding door according to claim 9 is characterized in that:

Between above-mentioned protrusion and the above-mentioned base plate, be provided with the support component that supports above-mentioned protrusion.

11. the bottom section of body with vehicle of sliding door according to claim 10 is characterized in that:

Above-mentioned support component is by constituting from the outstanding upward protrusion of above-mentioned base plate.

12. the bottom section of body with vehicle of sliding door according to claim 11 is characterized in that:

Above-mentioned base plate be positioned near the protrusion position, be equipped with spot welding and use the operation hole, between this operation hole and the protrusion, be provided with the parts that roughly are the cap shape, this upper end that roughly is the parts of cap shape engages with protrusion, its bottom be bonded on above-mentioned operation hole around.

13. the bottom section of body with vehicle of sliding door according to claim 1 is characterized in that:

Above-mentioned support component is made of the overall width direction outside portion of above-mentioned crossbeam.

14. the bottom section of body with vehicle of sliding door according to claim 13 is characterized in that:

Above-mentioned crossbeam has the overall width direction outside portion that combines with above-mentioned protrusion bottom surface, and more is positioned at overall width direction central authorities one side than protrusion, than overall width direction outside portion more to the outstanding overall width direction inside portion of short transverse,

Above-mentioned overall width direction inside portion is faced mutually with the sidepiece of above-mentioned protrusion.

15. the bottom section of body with vehicle of sliding door according to claim 14 is characterized in that:

The upper surface of above-mentioned crossbeam is formed with the dip plane from its overall width direction outside portion to overall width direction inside portion,

On the above-mentioned dip plane, be provided with when vehicle generation side collision and the butt parts of above-mentioned protrusion butt.

16., it is characterized in that according to any described bottom section of body in the claim 1 to 15 with vehicle of sliding door:

Above-mentioned crossbeam, be arranged on above-mentioned protrusion in the height faced mutually of the sidepiece of the guide rail resettlement section of being accommodated.

17., it is characterized in that according to any described bottom section of body in the claim 1 to 15 with vehicle of sliding door:

Above-mentioned crossbeam, the member that roughly is the cap shape by section constitutes.

18. the bottom section of body with vehicle of sliding door according to claim 17 is characterized in that:

Above the above-mentioned crossbeam, be arranged on the height that the crossbeam and the sidepiece of above-mentioned protrusion are faced mutually.

19. the bottom section of body with vehicle of sliding door according to claim 17 is characterized in that:

Above the above-mentioned base plate, be arranged on the height that the crossbeam and the sidepiece of guide rail resettlement section are faced mutually.

20. the bottom section of body with vehicle of sliding door according to claim 17 is characterized in that:

Near above-mentioned crossbeam and the junction surface that above-mentioned protuberance engages, be provided with the load-carrying element of strengthening in this crossbeam inside.

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