JP6660197B2 - Car body structure - Google Patents

Description

The present invention provides a vehicle width in which a damper base made of an aluminum alloy is connected to an upper wall, an outer wall in a vehicle width direction continuous to the upper wall via a first corner, and a vehicle width continuous to the upper wall via a second corner. Direction inner wall, a front wall continuous with the upper wall via a third corner, and a rear wall continuous with the upper wall via a fourth corner, a box structure in which the lower surface is open, An automobile body in which an upper end of a front wheel damper is fitted and supported in a first opening formed in an upper wall, and a plurality of first ribs extending radially from the first opening are formed on an upper surface of the upper wall. about the structure.

  The upper arm that swings upward with the base end as a fulcrum fits on the upper wall of the aluminum alloy casting damper base that supports the upper end of the damper of the front suspension device and the pair of front and rear joints of the U-shaped upper arm. A U-shaped opening is formed in such a manner that a joint on the front side of an upper arm is exposed from the U-shaped opening to increase the upward swing angle of the upper arm. It is known from document 1.

U.S. Pat. No. 8,448,966

  By the way, if an opening through which a part of the suspension arm enters is formed in the upper wall of the damper base, the rigidity of the damper base is reduced, and there is a possibility that it cannot withstand the load input from the damper. The above-mentioned conventional one is provided with radial ribs for increasing rigidity on the upper wall of the damper base, but since the ribs are interrupted at the edge of the opening and cannot exert a sufficient rigidity improving effect, The left and right damper bases are connected and reinforced by a cross member extending in the vehicle width direction.

  However, connecting the left and right damper bases with a cross member not only increases the number of parts and weight by the amount of the cross member, but also reduces the mounting space for the power unit below the cross member. However, it may be difficult to apply to a vehicle equipped with a large power unit such as an internal combustion engine.

  The present invention has been made in view of the above circumstances, and has as its object to increase the rigidity of a damper base made of an aluminum alloy while avoiding an increase in the number of parts and weight.

In order to achieve the above object, according to the invention described in claim 1, a damper base made of an aluminum alloy has an upper wall and an outer wall in a vehicle width direction continuous with the upper wall via a first corner. A vehicle width direction inner wall continuous with the upper wall via a second corner, a front wall continuous with the upper wall via a third corner, and a front wall continuous with the upper wall via a fourth corner. A box structure having a rear wall and an open lower surface, wherein an upper end of a damper of a front wheel is fitted and supported in a first opening formed in the upper wall, and the first opening is formed in an upper surface of the upper wall. A plurality of first ribs extending radially from a vehicle body structure, wherein the upper wall is located between the first corner and the first opening, and is a vehicle width direction outer end of a suspension arm of a front wheel. A second opening through which the portion can enter, and two of the plurality of first ribs are provided on both sides of the second opening. Said has reached the first corner, the vehicle width direction inner wall and said front recess reaches before the third corner and the second corner portion and extends vertically between the walls are formed, the vehicle width I body structure of a motor vehicle, characterized in Rukoto side recess is formed after the second corner extending in the vertical direction in the direction the inner wall and the rear walls and reaching the fourth corner is proposed.

According to the invention described in or claim 2, in addition to the first aspect, a vehicle width direction of the lower end of the front side frame with the vehicle width direction inner wall is inclined outward in the vehicle width direction downward A vehicle body structure is proposed in which the front recess and the rear recess are connected to an outer wall and are formed in an upper half portion of the inner wall in the vehicle width direction.

According to the third aspect of the invention, in addition to the configuration of the second aspect , a third rib parallel to the front wall is provided outside the front recess in the vehicle width direction, and the front wall and the third rib are provided. A first support portion for supporting a front portion of the suspension arm is formed on the rib, and a fourth rib parallel to the rear wall is provided outside the rear recess in a vehicle width direction, and the rear wall and the fourth rib are provided. A second support portion for supporting a rear portion of the suspension arm, wherein the first support portion and the second support portion are connected to a lower end of an inner wall in a vehicle width direction of the damper base. A body structure of a motor vehicle characterized by being located above an outer wall in the direction is proposed .

Na us, front reinforcing rib 25m of the embodiment corresponds to the third rib of the present invention, the rear reinforcing rib 25n of the embodiment corresponds to the fourth rib of the present invention, the first support hole of the embodiments 25o corresponds to the first support portion of the present invention, the second support hole 25p of the embodiment corresponds to the second support portion of the present invention, and the second member 29 of the embodiment corresponds to the vehicle width direction outer wall of the present invention. And the upper arm 31 of the embodiment corresponds to the suspension arm of the present invention.

  According to the configuration of claim 1, the aluminum alloy damper base is continuous with the upper wall, the outer wall in the vehicle width direction continuous with the upper wall via the first corner, and the upper wall with the second corner. A box structure in which a lower surface is opened, comprising a vehicle width direction inner wall, a front wall continuous to the upper wall via a third corner, and a rear wall continuous to the upper wall via a fourth corner, The upper end of the damper of the front wheel is fitted and supported in the first opening formed in the upper wall, and a plurality of first ribs extending radially from the first opening are formed on the upper surface of the upper wall. The rigidity of the upper wall of the damper base can be increased by supporting the load input to the first opening of the upper wall of the base with the plurality of first ribs.

In addition, the upper wall has a second opening between the first corner and the first opening, into which the outer end of the suspension arm of the front wheel in the vehicle width direction can enter, and two of the plurality of first ribs are provided. Since the first corner portion is reached through both sides of the second opening, the load input from the damper to the periphery of the first opening of the upper wall of the damper base has high rigidity via the two first ribs. By transmitting the force to the first corner, it is possible to minimize a decrease in rigidity of the upper wall of the damper base due to the formation of the second opening while avoiding an increase in the number of parts and weight. A front recess extending vertically between the vehicle width direction inner wall and the front wall and reaching the second corner and the third corner is formed, and extends vertically between the vehicle width direction inner wall and the rear wall to form the second corner. Since the rear recess reaching the corner portion and the fourth corner is formed, the front recess and the rear recess form six ridges on the inner wall, the front wall, and the rear wall in the vehicle width direction to increase the rigidity of the damper base. Can be.

According to or claim 2 configuration, the vehicle width direction inner wall lower end with inclined outward in the vehicle width direction downward are connected to the vehicle width direction outer wall of the front side frame, the front recesses and rear recesses car Since it is formed in the upper half of the inner wall in the width direction, not only can the damper inclined downward and outward in the vehicle width direction be easily stored inside the damper base, but also the amount of inclination of the inner wall in the vehicle width direction of the damper base The vehicle body rigidity can be increased by securing a large width of the front side frame in the vehicle width direction.

According to the third aspect, forming the first supporting portion provided front wall parallel to the third rib in the vehicle width direction outer side of the front recess, supports the front portion of the suspension arm to the front wall and the third rib In addition, a fourth rib parallel to the rear wall is provided outside the rear concave portion in the vehicle width direction, and a second support portion for supporting a rear portion of the suspension arm is formed on the rear wall and the fourth rib. Since the second support portion is located above the vehicle width direction outer wall of the front side frame to which the lower end of the vehicle width direction inner wall of the damper base is connected, the vertical load input to the damper base from the suspension arm is applied to the front side frame. It can be transmitted and absorbed efficiently .

FIG. 1 is a perspective view of a front part of a vehicle body of an automobile. FIG. 2 is an enlarged view of a part of FIG. 1. FIG. 3 is a view in the direction of arrows in FIG. 2. FIG. 3 is a view in the direction of arrows in FIG. 2. FIG. 5 is a sectional view taken along line 5-5 of FIG. 3. FIG. 3 is a view in the direction of arrows in FIG. 2.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In this specification, the front-rear direction, the left-right direction (vehicle width direction), and the up-down direction are defined with reference to an occupant sitting in a driver's seat.

  As shown in FIG. 1, a front portion of a vehicle body of a vehicle includes a floor 11 constituting a floor surface of a passenger compartment, a pair of left and right side sills 12, 12 extending in the front-rear direction along both left and right sides of the floor 11, A pair of left and right front pillar lowers 13, 13 standing from the front ends of the side sills 12, a pair of right and left front pillar uppers 14, 14 extending upward from the upper ends of the left and right front pillar lowers 13, and a front end of the floor 11. A dash panel lower 15 standing up from the front and connecting the left and right front pillar lowers 13, a pair of left and right front side frames 16, 16 extending forward from a front end of the floor 11, and upper ends of the left and right front pillar lowers 13, 13. And a pair of left and right rectangular cross-sectional members 17, 17 extending forward from front ends of the left and right rectangular cross-sectional members 17, 17, respectively. Comprises a Ppamenba 18, a pair of right and left lower member 19, 19 extending from the front end of the left and right upper members 18, 18 before the lower and the vehicle width direction inner side.

  Further, a front portion of the vehicle body includes a pair of left and right connecting members 20 and 20 connecting the front ends of the left and right front side frames 16 and 16 and the front ends of the left and right lower members 19 and 19 in the vehicle width direction. , 20, a pair of left and right bumper beam extensions 21, 21, a bumper beam 22 connecting the front ends of the left and right bumper beam extensions 21, 21 in the vehicle width direction, and a pair of left and right bumper beam extensions 21, 21. And a pair of left and right front bulkheads connecting the upper left and upper right corners of the front bulkhead 23 to the front-rear intermediate portions of the left and right lower members 19, 19. It has upper sides 24, 24 and the left and right front side frames 16, 16 and Fine left and right upper members 18, 18 while it is connected by aluminum casting made of a pair of left and right alloy damper base 25, 25. Each of the above members except for the damper bases 25, 25 is basically formed by pressing a steel plate.

  As shown in FIGS. 2 to 5, the upper member 18 includes a first member 26 having a substantially L-shaped cross section having an upper wall 26a, a vehicle width direction outer wall 26b, an upper flange 26c, and a lower flange 26d, and a lower wall 27a. The second member 27 having a substantially L-shaped cross section having an inner wall 27b in the vehicle width direction, an upper flange 27c, and a lower flange 27d is rectangularly closed by welding the upper flanges 26c, 27c and welding the lower flanges 26d, 27d. Configured in cross section. The front side frame 16 includes an upper wall 28a, an inner wall 28b in the vehicle width direction, and a lower wall 28c. The first member 28 has a U-shaped cross-section and opens outward in the vehicle width direction, and an opening of the first member 28. A closed section is formed by joining the second member 29 having a flat plate shape to be closed.

  2 to 6, the damper base 25 includes an upper wall 25a, a vehicle width direction outer wall 25b continuous with the upper wall 25a via the first corner c1, and a second corner c2 on the upper wall 25a. , A front wall 25d continuous with the upper wall 25a via the third corner c3, and a rear wall 25e continuous with the upper wall 25a via the fourth corner c4. It is configured in a box shape with its lower surface open. The upper wall 25a is formed with a circular first opening 25f located on the inner side in the vehicle width direction and a deformed second opening 25g located on the outer side in the vehicle width direction. The upper end of a damper (not shown) of the suspension device is fitted and supported, and a rubber cap 30 bulging upward is attached to the second opening 25g.

  The vehicle width direction outer wall 25b of the damper base 25 is connected to the vehicle width direction inner wall 27b of the second member 27 of the upper member 18, and the lower end of the vehicle width direction inner wall 25c of the damper base 25 is connected to the vehicle width direction outer wall of the front side frame 16. (See FIG. 5). When the damper base 25 is viewed in the front-rear direction, its lower side is inclined outward in the vehicle width direction, and other parts of the damper base 25 are also in the same direction as the vehicle width direction inner wall 25c so that undercut does not occur during casting. (In the direction of arrow A1 in FIG. 5).

  In the upper half of the damper base 25, a front recess 25h extending vertically between the vehicle width direction inner wall 25c and the front wall 25d to reach the second corner c2 and the third corner c3, a vehicle width direction inner wall 25c, A rear recess 25i extending vertically between the rear walls 25e and reaching the second corner c2 and the fourth corner c4 is formed (see FIGS. 1 and 3). As a result, three ridge lines extending vertically are formed on both side edges and the center of the front recess 25h, and three ridge lines extending vertically are formed on both sides and the center of the rear recess 25i.

  A plurality of first ribs 25j extending radially around the first opening 25f are formed on the upper surface of the upper wall 25a of the damper base 25, and the tips of the first ribs 25j. It reaches the surrounding first to fourth corners c1 to c4. Two first ribs 25j (1) and 25j (2) of the plurality of first ribs 25j... Pass near the second opening 25g and reach the first corner c1 (FIG. 2). And FIG. 3). On the lower surface of the upper wall 25a of the damper base 25, a plurality of second ribs 25k extending in various directions and intersecting with each other and intersecting the outer wall 25b, the front wall 25d, and the rear wall 25e are formed. Is done. The thickness of the second ribs 25k is smaller than the thickness of the first ribs 25j on the upper surface.

  Inside the damper base 25, a front reinforcing rib 25m connecting the upper wall 25a, the vehicle width direction outer wall 25b, and the vehicle width direction inner wall 25c and extending substantially in parallel with the front wall 25d (vehicle width direction); A rear reinforcing rib 25n extending substantially in parallel (in the vehicle width direction) with the rear wall 25e is formed by connecting the vehicle width direction outer wall 25b and the vehicle width direction inner wall 25c (see FIGS. 4 and 5).

  The upper arm 31 (see FIGS. 4 and 6) of the front wheel suspension device has a bifurcated front end and a rear end, and the front end is connected to the front wall 25d and the front wall 25d of the damper base 25 via the front rubber bush joint 32. The first support holes 25o, 25o (see FIG. 6) formed in the part reinforcing rib 25m are vertically swingably supported, and the rear end of the rear reinforcing rib 25m and the rear wall 25e of the damper base 25 via the rear rubber bush joint 33 are reinforced. The second support holes 25p, 25p (see FIG. 6) formed in the rib 25n are supported to be vertically swingable. A ball joint 34 (see FIG. 4) connected to a knuckle (not shown) is provided at the outer end of the upper arm 31 in the vehicle width direction, and the ball joint 34 is a second opening of the upper wall 25 a of the damper base 25. It is located below 25g.

  As shown in FIG. 2, the vehicle width direction outer wall 25b of the damper base 25 is fastened to the vehicle width direction inner wall 27b of the second member 27 of the upper member 18 via a plurality of rivets 35. As shown in FIG. 3, a steel plate 36 is fastened to a vehicle width direction inner wall 25c of the damper base 25 with a plurality of rivets 37. This steel plate 36 constitutes a vehicle width direction outer wall of the front side frame 16. The member 29 is welded through a plurality of window holes 25q formed on the inner wall 25c of the damper base 25 in the vehicle width direction. Then, a gusset 38 having an L-shaped cross section is welded to the inner surface in the vehicle width direction of the steel plate 36 and the upper surface of the upper wall 28a of the first member 28 of the front side frame 16.

  As shown in FIG. 1, the damper base 25, the steel plate 36, the upper member 18, the lower member 19, and parts 39F and 39R of the front and rear wheel houses are assembled in advance as a sub-assembly. It is connected to the frame 16 and the rectangular section member 17.

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  The load input to the front wheels from the road surface is transmitted to the upper wall 25a of the aluminum alloy damper base 25 via the damper and the upper arm 31, and the upper wall 25a is connected to the first corner c1 and the first opening 25f. Since there is a second opening 25g through which the ball joint 34 at the outer end in the vehicle width direction of the upper arm 31 of the front wheel can enter, there is a concern that the rigidity of the damper base 25 is reduced by the second opening 25g. However, according to the present embodiment, a plurality of first walls extending radially from the upper wall 25a of the damper base 25 around the first opening 25f and reaching the first to fourth corners c1 to c4 of the damper base 25. Since the ribs 25j are formed, the load input from the damper to the first opening 25f of the upper wall 25a of the damper base 25 is applied to the first to fourth corners c1 having high rigidity via the plurality of first ribs 25j. , The rigidity of the upper wall 25a of the damper base 25 can be increased while avoiding an increase in the number of parts and weight. In particular, since two first ribs 25j (1) and 25j (2) of the plurality of first ribs 25j... Reach the first corner c1 through both sides of the second opening 25g (FIG. 2 and FIG. 3), the reduction in rigidity of the upper wall 25a of the damper base 25 due to the formation of the second opening 25g can be minimized.

  Since a plurality of second ribs 25k thinner than the first ribs 25j are formed on the lower surface of the upper wall 25a of the damper base 25, a large number of second ribs are formed on the lower surface of the upper wall 25a narrower than the upper surface of the upper wall 25a. The ribs 25k are easily formed, and the lowering of the rigidity of the upper wall 25a of the damper base 25 due to the formation of the second opening 25g can be more effectively suppressed.

  Further, a front recess 25h is formed between the vehicle width direction inner wall 25c and the front wall 25d of the damper base 25 and extends vertically to reach the second corner c1 and the third corner c3, and the vehicle width direction inner wall 25c of the damper base 25 is formed. The rear recess 25i extending vertically between the rear wall 25e and the second corner c2 and the fourth corner c4 is formed. Therefore, the front recess 25h and the rear recess 25i define the inner wall 25c in the vehicle width direction. By forming six ridges on the front wall 25d and the rear wall 25e, the rigidity of the damper base 25 can be increased.

  At this time, the vehicle width direction inner wall 25c of the damper base 25 is inclined downward and outward in the vehicle width direction, and the lower end is connected to the second member 29 of the front side frame 16, and the front recess 25h and the rear recess 25i are Since it is formed in the upper half of the inner wall 25c in the vehicle width direction of the base 25 (see FIGS. 3 and 5), the damper inclined downward and outward in the vehicle width direction can be easily stored inside the damper base 25. In addition, if the vehicle width direction inner wall 25c of the damper base 25 extends straight up and down without tilting, the width of the front side frame 16 connected to the lower end of the vehicle width direction inner wall 25c of the damper base 25 in the vehicle width direction. It is difficult to secure the vehicle body rigidity sufficiently. However, by inclining the inner wall 25c of the damper base 25 in the vehicle width direction, the width of the front side frame 16 in the vehicle width direction is increased by the amount of the inclination to increase the vehicle body rigidity. Can be secured.

  A front reinforcing rib 25m parallel to the front wall 25d is provided outside the front recess 25h of the damper base 25 in the vehicle width direction, and the front rubber bush joint 32 of the upper arm 31 is supported by the front wall 25d and the front reinforcing rib 25m. First supporting holes 25o, 25o are formed, and a rear reinforcing rib 25n parallel to the rear wall 25e is provided outside the rear concave portion 25i in the vehicle width direction. The rear wall 25e and the rear reinforcing rib 25n have a rear portion of the upper arm 31. The second support holes 25p, 25p for supporting the rubber bush joint 33 are formed, and the first support holes 25o, 25o and the second support holes 25p, 25p are connected to the lower end of the vehicle width direction inner wall 25c of the damper base 25. Since it is located above the second member 29 of the side frame 16, it is input from the upper arm 31 to the damper base 25. It can be absorbed by effectively transfer loads downward to the front side frame 16.

  Moreover, since the second opening 25g is covered with the rubber cap 30, the ball joint 34 provided at the outer end in the vehicle width direction of the upper arm 31 is protected from dust and the like, and when an obstacle collides with the bonnet hood. In addition, the bonnet hood can be deformed by bending the rubber cap 30.

  Although the aluminum alloy damper base 25 is difficult to weld, the vehicle width direction outer wall 25b of the damper base 25 is fastened to the vehicle width direction inner wall 27b of the upper member 18 with rivets 35. 25 and the steel plate upper member 18 can be firmly connected. Furthermore, since the steel plate 36 is fastened to the inner wall 25c of the damper base 25 in the vehicle width direction with rivets 37 and the steel plate 36 is welded to the second member 29 of the front side frame 16, the aluminum alloy damper base 25, which is difficult to weld, is used. It can be firmly connected to the front side frame 16 made of a steel plate.

  The embodiments of the present invention have been described above. However, various design changes can be made in the present invention without departing from the gist thereof.

  For example, the suspension arm of the present invention is not limited to the upper arm 31 of the embodiment.

16 front side frame
2 5 damper base 25a on the wall 25b in the vehicle width direction outer wall 25c in the vehicle width direction inner wall 25d front wall 25e back wall 25f first opening 25g second opening 25h front recess 25i rear recess 25j first Li Bed
2 5 m front reinforcing rib (third rib)
25n rear reinforcement rib (fourth rib)
25o 1st support hole (1st support part)
25p 2nd support hole (2nd support part)
29 Second member (outer wall in the vehicle width direction )
31 upper arm (suspension arm )
c 1 First corner c2 Second corner c3 Third corner c4 Fourth corner

Claims (3)

A damper base (25) made of an aluminum alloy includes an upper wall (25a), a vehicle width direction outer wall (25b) continuous with the upper wall (25a) via a first corner (c1), and the upper wall (25). An inner wall (25c) continuous with the second corner (c2) via the second corner (c2), a front wall (25d) continuous with the upper wall (25a) via the third corner (c3), The upper wall (25a) is provided with a rear wall (25e) continuous with a fourth corner (c4) via a fourth corner (c4), and has a box structure in which the lower surface is open, and a first opening formed in the upper wall (25a). (25f), the upper end of the damper of the front wheel is fitted and supported, and a plurality of first ribs (25j) extending radially from the first opening (25f) are formed on the upper surface of the upper wall (25a). A car body structure,
The upper wall (25a) has a second opening through which a vehicle width direction outer end of a suspension arm (31) of a front wheel can enter between the first corner (c1) and the first opening (25f). (25g), two of the plurality of first ribs (25j) pass through both sides of the second opening (25g) to reach the first corner (c1) ,
A front recess (25h) is formed between the vehicle width direction inner wall (25c) and the front wall (25d) and extends vertically to reach the second corner (c2) and the third corner (c3), A rear recess (25i) is formed between the inner wall (25c) and the rear wall (25e) in the vehicle width direction and extends vertically to reach the second corner (c2) and the fourth corner (c4). A body structure of an automobile characterized by that: The vehicle width direction inner wall (25c) is inclined downward and outward in the vehicle width direction, and has a lower end connected to the vehicle width direction outer wall (29) of the front side frame (16). The vehicle body structure according to claim 1 , wherein the side recess (25i) is formed in an upper half portion of the inner wall (25c) in the vehicle width direction. A third rib (25m) parallel to the front wall (25d) is provided outside the front recess (25h) in the vehicle width direction, and the suspension arm (31) is provided on the front wall (25d) and the third rib (25m). ) Is formed, and a fourth rib (25n) parallel to the rear wall (25e) is provided outside the rear concave portion (25i) in the vehicle width direction. A second support (25p) for supporting a rear portion of the suspension arm (31) is formed on the rear wall (25e) and the fourth rib (25n), and the first support (25o) and the second support are formed. The portion (25p) is located above a vehicle width direction outer wall (29) of the front side frame (16) to which a lower end of the vehicle width direction inner wall (25c) of the damper base (25) is connected. , to claim 2 Body structure of a motor vehicle mounting.

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