CN1944156B - Lower structure of car body - Google Patents

Lower structure of car body Download PDF

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Publication number
CN1944156B
CN1944156B CN2006101359182A CN200610135918A CN1944156B CN 1944156 B CN1944156 B CN 1944156B CN 2006101359182 A CN2006101359182 A CN 2006101359182A CN 200610135918 A CN200610135918 A CN 200610135918A CN 1944156 B CN1944156 B CN 1944156B
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China
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mentioned
side member
floor side
crossbeam
support
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Expired - Fee Related
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CN2006101359182A
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Chinese (zh)
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CN1944156A (en
Inventor
江岛胜美
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Mazda Motor Corp
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Mazda Motor Corp
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  • Seats For Vehicles (AREA)

Abstract

The present invention relates to a lower body structure for a vehicle, which includes a floor (1) of a spare tire pan (1a) depressing downwards, a pair of rear carlings (2a, 2b) disposed on the left/right side of the floor (1) and extending along the front/rear direction of the vehicle body, a beam (3) bridged between the pair of rear carlings (2a, 2b) in the front part of the spare tire pan (1a), a sub frame (4) at least a part of which is supported by a support part (5) of the rear side carlings (2a, 2b) at a rear position of the beam (3), and a junction panel (7) bridged between the end neighborhood of the beam (3), and the support part (5) of the sub frame (4) on the rear carlings (2a, 2b) and the spare tire pan (1a). By using the present invention, the simple structure can be used to efficiently improve the support rigidity of the sub frame by the support part, even layout is restricted by arrangement of the spare tire pan.

Description

The underbody structure of automobile
Technical field
The present invention relates to a kind of automobile lower body structure, comprise the tyre-well (tire pan) that is formed with downwards depression base plate, be arranged on this base plate left and right sides and a pair of floor side member that extends along the vehicle body fore-and-aft direction, be set up in the crossbeam between the above-mentioned a pair of floor side member, the sub-frame that at least a portion is supported by the set support portion of floor side member in the rear position of above-mentioned crossbeam in the front portion of above-mentioned tyre-well.
Background technology
Underbody structure as automobile, known have by about be provided for sub-frame is installed on department of assembly on the pair of right and left floor side member, and about an end of each department of assembly below tyre-well, connected by roughly linearly tension part (tensioner), thereby prevent rear part bending laterally when vehicle generation rear impact (open communique spy opens 2001-151144 number with reference to Japanese Patent) of formed sweep on the floor side member.
In addition, in the disclosed automobile lower body structure of above-mentioned communique, for the rigidity of support of the department of assembly of the support portion of fully guaranteeing to constitute sub-frame, the bottom and the above-mentioned tension part of the formed tyre-well that will cave in downwards by a part that makes base plate are connected in the middle part.
Yet, if vehicle is full size vehicle, the also corresponding increase of the size of its spare tyre, thereby the volume of accommodating of tyre-well also needs to increase, the bottom of tyre-well will significantly be given prominence to downwards like this.Therefore, in fact be difficult to be set to below tyre-well as described above when roughly linearly when above-mentioned tension part, in order to cooperate the shape of tyre-well bottom, the central part of this tension part need adopt outstanding shape downwards.If tension part is above-mentioned concaveconvex shape, then be unfavorable for improving the rigidity of floor side member.
Summary of the invention
Even the object of the present invention is to provide a kind ofly, also improve the automobile lower body structure of the rigidity of bottom vehicle body by simple structure effectively because of being provided with of tyre-well produces restriction to layout.
Automobile lower body structure of the present invention comprises: base plate is formed with the tyre-well of depression downwards; A pair of floor side member is arranged on the left and right sides of above-mentioned base plate and extends along the vehicle body fore-and-aft direction; Crossbeam is set up between the above-mentioned a pair of floor side member so that above-mentioned a pair of floor side member is carried out direct connection in the front portion of above-mentioned tyre-well; Back underarm is connected on the wheel bracing or strutting arrangement of support wheel; Sub-frame, at least a portion is supported by the set support portion of floor side member in the rear position of above-mentioned crossbeam, and the end of described back underarm is shaken and is connected freely on the described sub-frame; Link, be erected near the end of above-mentioned crossbeam, be arranged between the above-mentioned support portion of the above-mentioned sub-frame on the above-mentioned floor side member, the above-mentioned tyre-well three so that this three is connected, described link is by integrally formed plate-shaped member, above-mentioned floor side member and above-mentioned crossbeam bonded assembly connection location are provided with the spring support portion of supporting the spring in the draft hitch.
Adopt above-mentioned automobile lower body structure,, also can pass through above-mentioned link, effectively utilize, strengthen body bottom section by crossbeam, floor side member, the formed finite space in tyre-well side even because of the setting of tyre-well is restricted the layout of vehicle.Thereby can improve the rigidity of support of support portion set on the floor side member effectively with respect to sub-frame.
Adopt above-mentioned automobile lower body structure,, therefore can help to improve rigidity of support with respect to spring by crossbeam because the support portion that is positioned at the spring upper end side is directly installed on the vehicle body.In above-mentioned automobile lower body structure, above-mentioned link can comprise, the tyre-well installation portion of installing with respect to above-mentioned tyre-well; Horizontal part from above-mentioned tyre-well installation portion along continuous straight runs extension; The longitudinal wall part of extending upward from above-mentioned horizontal part; Above-mentioned horizontal part is erected between near the support portion that the end is and above-mentioned floor side member is set of above-mentioned crossbeam.
Adopt above-mentioned automobile lower body structure,, therefore can improve the link self rigidity because link has horizontal part and longitudinal wall part.
In above-mentioned automobile lower body structure, set up the closed sectional parts between the above-mentioned floor side member, being formed in the cushion frame of the seat that is provided with on the indoor roughly whole Width of car, the two ends of these closed sectional parts be installed in above-mentioned support portion near.
Adopt above-mentioned automobile lower body structure, by effectively utilizing the existing frame parts that cushion frame constitutes, therefore need not to be provided with new strengthening part can improve the rigidity of support of above-mentioned support portion to sub-frame.
In above-mentioned automobile lower body structure, the left and right sides of above-mentioned cushion frame is respectively arranged with the installing component of a plurality of installation portions of tool, and is erected on above-mentioned floor side member and the above-mentioned link by above-mentioned installing component.
Adopt above-mentioned automobile lower body structure,, therefore can improve the Joint strenght of link with respect to floor side member because link is connected in many places with floor side member.
In above-mentioned automobile lower body structure, the middle part of above-mentioned cushion frame is connected with the 2nd crossbeam that is positioned at above-mentioned crossbeam the place ahead through support.
Adopt above-mentioned automobile lower body structure, can improve the rigidity of cushion frame effectively by the 2nd crossbeam.And cushion frame helps to improve the rigidity of above-mentioned support portion, thereby can further improve the rigidity of support of this support portion to sub-frame.
Description of drawings
Fig. 1 is the upward view of the related automobile lower body structure of expression embodiments of the present invention.
Fig. 2 is the cutaway view of A-A line direction among Fig. 1.
Fig. 3 is the block diagram of the related automobile lower body structure of expression embodiments of the present invention.
Fig. 4 is a part sectional view of roughly representing the formation of draft hitch.
Fig. 5 is the block diagram of expression bench formula (bentch type) seat unit.
Fig. 6 is from the block diagram of observation cushion frame in rear with respect to the mounting structure of vehicle body.
Fig. 7 is a block diagram of removing the state behind cushion frame, the framework mounting bracket in the presentation graphs 6.
Fig. 8 is the cutaway view of B-B line direction among Fig. 6.
Fig. 9 is the block diagram of the related automobile lower body structure of expression other embodiment of the present invention.
The specific embodiment
Below, in conjunction with the accompanying drawings embodiments of the present invention are described.
Fig. 1 is the upward view of the related automobile lower body structure of expression embodiments of the present invention, at body tail, caves in downwards by a part that makes base plate 1, and formation can be accommodated the tyre-well 1a of spare tyre SW.In addition, below the left and right sides of base plate 1, be provided with a pair of floor side member 2a, the 2b that extend along the vehicle body fore-and-aft direction.
By setting up the 1st crossbeam 3 that extends along the overall width direction between above-mentioned floor side member 2a, 2b, thereby this floor side member 2a, 2b are connected mutually in the front portion of tyre-well 1a.
In addition, between this floor side member 2a, 2b, be provided with the sub-frame 4 that is constituted by the framework that roughly is " well " shape (perimeter type frame), the end, front and back of these sub-frame 4 left and right sides is suspended, is supported by set department of assembly, the bottom of floor side member 2a, 2b (mount) 5 (being equivalent to support portion of the present invention) respectively.Sub-frame 4, each position, 1 place of its left and right sides promptly is positioned at the position at the 1st crossbeam 3 rears, is supported on floor side member 2a, the 2b by department of assembly 5.In addition, among the figure, arrow (F) expression vehicle front, arrow (R) expression rear view of vehicle.
Department of assembly 5 shown in Fig. 2 (cutaway view of Figure 1A-A line direction), has clamped rubber between inner core 5b and the urceolus 5c, and wherein, inner core 5b is passed from the outstanding downwards bolt 5a of floor side member 2a, and the outside face of urceolus 5c can be installed the end of sub-frame 4.By the support portion that is made of this department of assembly 5, sub-frame 4 is resilient mounting with respect to floor side member 2a (vehicle body).
In the groove that is recessed to form in floor side member 2a (in the closed sectional), be provided with the reinforced support 6 of sub-frame support portion downwards, by the reinforced support 6 of this sub-frame support portion, the upper end side of bolt 5a is fixed on assigned position.In addition, only represented the left side (floor side member 2a) of vehicle body among Fig. 2, but because the left side of the right side (floor side member 2b) of vehicle body and vehicle body is a symmetric relation, and structure is basic identical, so its diagram etc. is omitted.In addition, the interior side direction of arrow among the figure (IN) expression vehicle, the lateral direction of arrow (OUT) expression vehicle.
In addition, in the present embodiment, as shown in Figure 1, the left and right sides at body bottom section, be respectively arranged with connecting panel 7 (being equivalent to link of the present invention), this connecting panel 7 is erected near the end of the 1st crossbeam 3 that is connected with floor side member 2a, 2b, between the outside face of, the tyre-well 1a of the department of assembly 5 of resilient mounting sub-frame 4 near, this three.
Connecting panel 7, as Fig. 2, Fig. 3 (block diagram of expression body bottom section), shown in Figure 7, the plate-shaped member that is one of the forming, comprise, cooperate the shape of tyre-well 1a side and the tyre-well installation portion 7a, the horizontal part 7b that are formed, the longitudinal wall part 7c that extends upward from this horizontal part 7b, extend and constitute the planar base plate installation portion of level 7d with respect to the attachment face of base plate 1 from this longitudinal wall part 7c.
At this, horizontal part 7b has with respect to the bottom surface of the 1st crossbeam 3 and the attachment face of floor side member 2a (2b).In addition, horizontal part 7b, setting is expanded in the space of bight that is formed by connecting with respect to the 1st crossbeam 3 and floor side member 2a and the formed roughly shape triangular in shape in side of tyre-well 1a.
By connecting panel 7 being erected between tyre-well 1a, floor side member 2a, the 1st crossbeam 3, can strengthen body bottom section, improve its rigidity.And, even the layout that is provided with strengthening part of tyre-well produces restriction, also can effectively utilize the formed space, side of above-mentioned bight and tyre-well 1a by connecting panel 7, strengthen body bottom section with this.
As mentioned above, come body bottom section is strengthened, can utilize limited space to improve the rigidity of support of department of assembly 5 effectively with respect to sub-frame 4 by construction company's relay part 7 between the 1st crossbeam 3, floor side member 2a, 2b and tyre-well 1a.
In addition, as shown in Figure 2, connecting panel 7 and the bottom surface of base plate 1, the side of tyre-well 1a, the side of floor side member 2a in the part position of floor side member 2a, form closed sectional structure C s.By forming this closed sectional structure C s, can further improve the rigidity between tyre-well 1a (base plate 1) and the floor side member 2a, thereby further improve the rigidity of body bottom section.
In addition,, and form as shown in Figure 3 stepped, therefore have the rigidity that fully to bear the load that is applied to it because connecting panel 7 has above-mentioned horizontal part 7b, longitudinal wall part 7c, base plate installation portion 7d.And by between floor side member 2a and the 1st crossbeam 3, local formation by horizontal part 7b, the longitudinal wall part 7c of above-mentioned tyre-well 1a side, connecting panel 7 and the closed sectional structure that base plate 1 is constituted can be improved the rigidity of body bottom section.
In addition, as shown in the figure, longitudinal wall part 7c is positioned at the position separated by a distance, bight that is formed by connecting with floor side member 2a and the 1st crossbeam 3.Near this corner part, connecting panel 7 caves in upward.By this structure, can avoid the connecting panel 7 and the suspension cover (suspension housing) 8 (being equivalent to spring of the present invention support portion) of back suspension device described later to produce interference infalliblely.
Below, in conjunction with Fig. 3 and Fig. 4 (part sectional view of roughly representing the structure of back suspension device) the spring mounting structure of the back suspension device of present embodiment is described.
In the past, the assembling of back suspension device installation procedure (assembly) performance (stack-mounted complexity) is relatively poor, need earlier helical spring upper end to be installed on the sub-frame, will comprise that then the assembly of sub-frame, coil spring, arm (arm) group, wheel bracing or strutting arrangement is installed on the vehicle body.
And in the present embodiment, the suspension cover 8 of the upper end of support helix spring 9 is arranged on the connection location of floor side member 2a (2b) and the 1st crossbeam 3, promptly is directly installed on the vehicle body.
Like this, can support coil spring 9 at floor side member 2 and the 1st crossbeam 3 bonded assembly connection locations, the 1st crossbeam 3 helps to improve the rigidity of support with respect to coil spring 9.
At this, as shown in Figure 4, be positioned at the last helical spring seat 10 (being equivalent to spring of the present invention support portion) of the upper end side of coil spring 9, comprise the 10a of rubber base portion and the 10b of metal pedestal portion of ring-type.In addition, last helical spring seat 10, only the antagonistic force (application force of direction of extension) by coil spring 9 is by pressing to the suspension cover 8 that is weldingly fixed on the floor side member 2a, and keeps positioning states, the upper end of support helix spring 9 thus.At this, absorbed by the 10a of rubber base portion owing to transmitting the vibration that comes from coil spring 9, therefore the transfer of vibration to vehicle body ( floor side member 2a, 2b) is suppressed.
The peripheral part of suspension cover 8 is formed with reclinate flange part 8a.This flange part 8a, the effect of starting block (stopper) makes helical spring seat 10 can not produce displacement because of the stretching of coil spring 9, vibration etc. in the horizontal direction.
In addition, be provided with the reinforced support 11 of spring support portion in the groove of floor side member 2a.By the reinforced support 11 of this spring support portion, can strengthen among the floor side member 2a part as the installation site of the suspension cover 8 of the antagonistic force that bears coil spring 9.
In addition, 13 among the figure is the back underarm, by the following helical spring seat 14 that is wholely set with this back underarm 13, but the bottom of support helix spring 9.In addition, back underarm 13 extends along the overall width direction, and its outboard end is shaken through lining (bush) 15 and is connected freely on the sub-frame 4.This back underarm 13 is provided with positioning cam (alignment cam) 16 with the connecting portion of sub-frame 4.By adjusting this positioning cam 16, can regulate the toe-in (toe-in) of back suspension device, flare (camber) etc.
The overall width direction outer end of back underarm 13 is connected with wheel bracing or strutting arrangement 17 through lining 15.This wheel bracing or strutting arrangement 17, the bottom (all not shown) of the bumper that be connected with an end of the rocking arm that rotates the wheel hub of support wheel (wheel hub) freely, extends to vehicle body the place ahead, extends to the vehicle body oblique upper.Draft hitch is mainly by above-mentioned sub-frame 4, coil spring 9, back underarm 13, wheel bracing or strutting arrangement 17 and not shown upper arm (upper arm), preceding underarm formations such as (front lowerarm).
Below, in conjunction with Fig. 5 to Fig. 8 the mounting structure of the cushion frame of the bench formula seat of present embodiment is described.
In the present embodiment, as the back seat that is arranged on interior of body, the roughly whole Width of car chamber interior is provided with bench formula seat unit 20 shown in Figure 5, by being erected at the cushion frame 22 between above-mentioned floor side member 2a, the 2b, improves the rigidity of support of sub-frame 4.
Bench formula seat unit 20 comprises, constitutes the seat face with support occupant's the buttocks and the cushion of huckle; Constitute the backrest face with support occupant's the waist and the back of seat at back; Be arranged on the headrest (all not shown) of back of seat upper end.Wherein, cushion and back of seat are built-in with cushion frame 21,22 and back frame 23,23 as skeleton respectively.
Cushion frame 21,22 and back frame 23,23 are provided with along the whole profile of cushion and backrest.The rear end of the cushion frame 21 that extends along fore-and-aft direction and the lower end of back frame 23, both ends and central part at bench formula seat unit 20 are connected by rear side link 24.At the upside of base plate 1, be positioned at the both ends of cushion and the downside position of central portion, be provided with side bracket (side bracket) 25a, 25c and central support (center bracket) 25b.The front portion of this side bracket 25a, 25c and central support 25b with the front end of cushion frame 21, is connected by link 26.
Along the cushion frame 22 that the overall width direction is extended, be weldingly fixed on the rear end of side bracket 25a, 25c and central support 25b.In addition, shown in Fig. 6 (from the block diagram of observation cushion frame 22 in rear) with respect to the mounting structure of vehicle body, corresponding to backrest separated position and front end of the central support 25b that is provided with on the overall width direction, be installed on the 2nd crossbeam 28 that is positioned at the 1st crossbeam 3 the place aheads, make the middle part of the 2nd crossbeam and cushion frame 22, connected through above-mentioned central support 25b.
This cushion frame 22 is by formed rigid elements of closed sectional parts such as square tubing, is arranged on the roughly whole Width of car chamber interior of bench formula seat unit 20, and is erected between floor side member 2a, the 2b.Be used for bench formula seat unit 20 is installed in the longitudinal wall part 27a of cushion frame mounting bracket 27 on the base plate 1 (below, be called for short framework mounting bracket 27, be equivalent to installing component of the present invention), be fixedly installed on the two ends of cushion frame 22 from the overall width direction outside.Rear side link 24 is connected (with reference to Fig. 5) from overall width direction inboard with the top of the longitudinal wall part 27a of said frame mounting bracket 27.
In addition, framework mounting bracket 27, have from longitudinal wall part 27a roughly at right angles crooked to overall width direction inboard, and the horizontal part 27b that extends along horizontal direction.And, on this horizontal part 27b, be formed with a plurality of mounting holes (is 2 at this) 27b1,27b2 respectively as installation portion.
Among above-mentioned mounting hole 27b1, the 27b2, mounting hole 27b1 is used for and will be arranged on the facial hole that is connected with framework mounting bracket 27 of going up of chair mounted the 1st support 29 on the groove inwall of floor side member 2b (2a).As shown in Figure 7, chair mounted the 1st support 29 is weldingly fixed on the side 2b1 of groove of floor side member 2b.In addition, Fig. 7 represents to remove the state behind cushion frame shown in Figure 6 22, the framework mounting bracket 27.In addition, only represented right side (floor side member 2b) structure of vehicle body among Fig. 6, Fig. 7, but the right side (floor side member 2b) of the left side of vehicle body (floor side member 2a) and vehicle body is a symmetric relation, structure is basic identical, so the diagram of vehicle body left side structure is omitted.
Mounting hole 27b2 is to be used for the facial hole that is connected with framework mounting bracket 27 of going up of chair mounted the 2nd support 30.This chair mounted the 2nd support 30 is positioned at the space of the inboard of horizontal part 7b and the formed connecting panel 7 of longitudinal wall part 7c.The base portion 30a of chair mounted the 2nd support 30 is weldingly fixed on the upper surface of horizontal part 7b.In addition, as shown in Figure 7, chair mounted the 2nd support 30 is concaveconvex shape, have base portion 30a and with framework mounting bracket 27 bonded assembly convex surface part 30b.
In addition, above-mentioned sub-frame support portion reinforced support 6 and above-mentioned spring support portion reinforced support 11 as mentioned above, are arranged in the groove of floor side member 2b, and, as shown in Figure 7, fore-and-aft direction predetermined distance be provided with of being separated by.In addition, department of assembly 5 (with reference to Fig. 1) is positioned at the downside of sub-frame support portion reinforced support 6 across floor side member 2b, and suspension cover 8 is positioned at the downside of spring support portion reinforced support 11 across floor side member 2b.
The reinforced support 6 of sub-frame support portion is positioned at the place ahead of chair mounted the 1st support 29, and engage the groove that is fixed on floor side member 2b about on two side 2b1, the 2b2.And the reinforced support 6 of sub-frame support portion is that length and the section with the recess width that is suitable for floor side member 2b is the parts of " コ " shape, and has from the outstanding upward convex surface part 6a of the groove floor of floor side member 2b.Be used to install the end of the bolt 5a of department of assembly 5 (with reference to Fig. 1), be fixed on this convex surface part 6a.In addition, as shown in Figure 6, the reinforced support 6 of sub-frame support portion, with the connection location that is positioned at floor side member 2b and the 2nd crossbeam 28 near the position that corresponds to, department of assembly, front side 5, also be provided with.
Spring support portion reinforced support 11 is arranged on above-mentioned the place ahead that is positioned at the sub-frame support portion reinforced support 6 of rear side, and engage the groove be fixed on floor side member 2b about on two side 2b1, the 2b2.In addition, spring support portion reinforced support 11 is to have the length of the recess width that is suitable for floor side member 2b and the parts that section is concaveconvex shape, and as shown in Figure 7, the 11a of its hypomere portion is connected with the groove floor of floor side member 2b.
Herein, as Fig. 6, shown in Figure 7, the end of cushion frame 22 through framework mounting bracket 27 and chair mounted the 1st support 29,30, is installed near the top of bolt 5a of department of assembly 5.
Like this, by being erected at the two ends of the cushion frame 22 between floor side member 2a, the 2b, be installed in the department of assembly 5 that supports sub-frame 4 near, can improve the rigidity of support of department of assembly 5 with respect to sub-frame 4.That is,, can improve the rigidity of support of department of assembly 5 with respect to sub-frame 4 by effectively utilizing the existing frame parts that cushion frame 22 is constituted.
In addition, as Fig. 8 (B-B line direction in Fig. 6, under the state that comprises mounting hole 27b1,27b2, the cutaway view that dissects vehicle body and obtain) shown in, framework mounting bracket 27, through chair mounted the 1st, the 2nd support 29,30,, be erected on floor side member 2b and the connecting panel 7 through including two installation portions of mounting hole 27b1,27b2.
Therefore, connecting panel 7 and floor side member 2b are not only directly engaged by horizontal part 7b and are fixed, and also by chair mounted the 1st, the 2nd support 29,30, and each connecting portion of framework mounting bracket 27 is connected.Like this, connecting panel 7 and floor side member 2b bonded assembly structure adopt and give the bonded assembly structure by a plurality of connecting portions, therefore can improve the Joint strenght of connecting panel 7 with respect to floor side member 2b effectively.
In addition, as mentioned above,, therefore can improve the rigidity of cushion frame 22 because the middle part of cushion frame 22 is installed on the 2nd crossbeam 28 (with reference to Fig. 6) through central support 25b.Like this, near the rigidity of the department of assembly 5 cushion frame 22 ends is further enhanced, thereby can further improve the rigidity of support of department of assembly 5 with respect to sub-frame 4.
In addition, in the present embodiment, bench formula seat unit 20, its backrest is divided into a plurality of on the overall width direction, but is not limited thereto, and its backrest also can one constitute on the overall width direction.
In addition, connecting panel 7 for having the stepped parts of horizontal part 7b, longitudinal wall part 7c, but is not limited thereto.For example, as shown in Figure 9, connecting panel 70 also can be the plate-shaped member that only is made of tyre-well installation portion 70a and horizontal part 70b.At this moment, as shown in the figure, only need connecting near the bight that the 1st crossbeam 3 and floor side member 2a (2b) form, horizontal part 70b is formed leave the circular-arc edge portion of suspension cover 8 predetermined distances to get final product.
Even like this, also can improve the rigidity of support of department of assembly 5 by construction company's fishplate bar 70 between the 1st crossbeam 3, floor side member 2a (2b), tyre-well 1a with respect to sub-frame 4.On this basis, by simplifying the shape of connecting panel 70, make it to be easy to be installed on the vehicle body.
In addition, connecting panel 70 self rigidity also can be strengthened by form a plurality of strengthening rib 70c on horizontal part 70b, to replace the mode that forms longitudinal wall part 7c.Among Fig. 9, pay identical symbol, omit it and be described in detail for the parts identical with effect of initial embodiment etc.
The present invention is not limited to above-mentioned embodiment, also can carry out numerous variations.

Claims (6)

1. an automobile lower body structure is characterized in that, comprising:
Base plate is formed with the tyre-well of depression downwards;
A pair of floor side member is arranged on the left and right sides of above-mentioned base plate and extends along the vehicle body fore-and-aft direction;
Crossbeam is set up in the front portion of above-mentioned tyre-well between the above-mentioned a pair of floor side member and above-mentioned a pair of floor side member direct connection;
Back underarm is connected on the wheel bracing or strutting arrangement of support wheel;
Sub-frame, at least a portion is supported by the set support portion of floor side member in the rear position of above-mentioned crossbeam, and the end of described back underarm is shaken and is connected freely on the described sub-frame;
Link is erected near the end of above-mentioned crossbeam, is arranged between the above-mentioned support portion of the above-mentioned sub-frame on the above-mentioned floor side member, the above-mentioned tyre-well three so that this three is connected,
Described link is made of integrally formed plate-shaped member,
Above-mentioned floor side member and above-mentioned crossbeam bonded assembly connection location are provided with the spring support portion of supporting the spring in the draft hitch.
2. automobile lower body structure according to claim 1 is characterized in that:
Above-mentioned link comprises,
The tyre-well installation portion of installing with respect to above-mentioned tyre-well;
Horizontal part from above-mentioned tyre-well installation portion along continuous straight runs extension;
The longitudinal wall part of extending upward from above-mentioned horizontal part;
Above-mentioned horizontal part is erected between near the support portion that the end is and above-mentioned floor side member is set of above-mentioned crossbeam.
3. automobile lower body structure according to claim 1 and 2 is characterized in that:
Set up the closed sectional parts between the above-mentioned floor side member, being formed in the cushion frame of the seat that is provided with on the indoor roughly whole Width of car,
The two ends of above-mentioned closed sectional parts be installed in above-mentioned support portion near.
4. automobile lower body structure according to claim 3 is characterized in that:
Above-mentioned cushion frame, its left and right sides is respectively arranged with the installing component of a plurality of installation portions of tool;
Above-mentioned cushion frame by above-mentioned installing component, is erected on above-mentioned floor side member and the above-mentioned link.
5. automobile lower body structure according to claim 3 is characterized in that:
Above-mentioned cushion frame, the position, intermediate portion is connected with the 2nd crossbeam that is positioned at above-mentioned crossbeam the place ahead through support.
6. automobile lower body structure according to claim 4 is characterized in that:
Above-mentioned cushion frame, the position, intermediate portion is connected with the 2nd crossbeam that is positioned at above-mentioned crossbeam the place ahead through support.
CN2006101359182A 2005-10-05 2006-09-29 Lower structure of car body Expired - Fee Related CN1944156B (en)

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JP2005291952 2005-10-05
JP2005-291952 2005-10-05
JP2005291952A JP4815979B2 (en) 2005-10-05 2005-10-05 Lower body structure of automobile

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CN1944156A CN1944156A (en) 2007-04-11
CN1944156B true CN1944156B (en) 2011-05-11

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