JP2017210141A - Suspension attachment part structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspension attachment part structure of a vehicle which enables a vehicle body frame to stably support a load input from a suspension part with high rigidity and strength while inhibiting increase of vehicle weight and sharp rise of product costs.SOLUTION: An attachment bracket 17 for attaching an upper part of a suspension part to a vehicle body frame is provided. The attachment bracket 17 has: a bracket body 17A which is inserted and disposed in a closed cross section of the vehicle body frame to hold an upper part of the suspension part; a vehicle outer side fastening part which fastens the bracket body 17A to a lower wall of the vehicle body frame; and a vehicle inner side fastening part which fastens the bracket body 17A to an upper wall of the vehicle body frame.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a suspension mounting portion structure for a vehicle.

  As a suspension of a vehicle, a suspension arm that holds an axle is swingably attached to a vehicle body, and a suspension component such as a shock absorber or a spring is attached between the suspension arm and the vehicle body frame (for example, Patent Document 1).

  In the suspension attachment portion structure described in Patent Document 1, a cup-like attachment bracket is attached to the upper end portion of the shock absorber, and the attachment bracket is fixed to the lower wall of the vehicle body frame having a substantially rectangular cross section by bolt fastening. More specifically, the lower wall of the body frame is provided with an opening for allowing a part of the mounting bracket to protrude above the lower wall, and the lower end of the mounting bracket is in contact with the lower edge of the opening of the body frame. The flange part which touches is extended. In a state where a part of the mounting bracket protrudes upward from the opening of the body frame, the flange portion is bolted to the lower wall of the body frame.

Japanese Patent No. 4035461

In the suspension mounting portion structure described in Patent Document 1, a mounting bracket that holds the upper end portion of the shock absorber is bolted only to the lower wall of the vehicle body frame. For this reason, in order to stably support the load input from the shock absorber on the vehicle body frame with high rigidity and strength, measures are taken by increasing the thickness of the mounting bracket or reinforcing the cross section of the vehicle body frame. There is a need.
However, there is a concern that such countermeasures may lead to an increase in vehicle weight due to an increase in the thickness of parts and an increase in product cost due to an increase in the number of parts.

  Accordingly, the present invention provides a suspension mounting portion structure for a vehicle that can stably support a load input from a suspension component on a vehicle body frame with high rigidity and strength while suppressing an increase in vehicle weight and a rise in product cost. Is to provide.

The suspension mounting portion structure for a vehicle according to the present invention employs the following configuration in order to solve the above problems.
That is, the suspension mounting portion structure for a vehicle according to the present invention includes an upper wall (for example, the upper wall 20u of the embodiment) facing the vehicle interior side and a lower wall (for example, the lower wall 20l of the embodiment) facing the lower outside of the vehicle interior. ) Having a closed cross-sectional structure (for example, the cross member 6 and the vehicle body floor 5 of the embodiment), and a suspension arm (for example, the inner arm portion 11 of the embodiment, The outer arm portion 12), suspension components (for example, the shock absorber 15 and the spring 16 of the embodiment) that are interposed between the suspension arm and the vehicle body frame and receive an input load acting on the suspension arm, A mounting bracket for attaching the upper part of the suspension part to the vehicle body frame (for example, the mounting bracket of the embodiment) 7, 18), and the mounting bracket is inserted and disposed within a closed cross section of the vehicle body frame to hold the upper part of the suspension component (for example, the bracket body 17 </ b> A of the embodiment), and the bracket A vehicle outer side fastening portion (for example, the fastening flange 17B of the embodiment) for fastening a main body to the lower wall of the vehicle body frame and a vehicle inner side fastening portion (for example, an implementation) for fastening the bracket main body to the upper wall of the vehicle body frame. And a fastening plate 17C) of the form.

  With the above configuration, the bracket body of the mounting bracket is disposed within the closed cross section of the vehicle body frame, and in this state, the bracket body is fastened and fixed to the lower wall and the upper wall of the vehicle body frame by the vehicle exterior fastening portion and the vehicle interior fastening portion. The For this reason, the load input to the suspension component is distributed and supported on the plurality of walls of the vehicle body frame. Further, since the bracket body is fastened and fixed to the lower wall and the upper wall of the vehicle body frame by the vehicle outer side fastening portion and the vehicle inner side fastening portion, the mounting bracket functions as a reinforcing member that reinforces the cross section of the vehicle body frame. .

  The lower wall of the vehicle body frame is provided with an opening (for example, the opening 25 of the embodiment) for inserting the bracket body into the closed cross section of the vehicle body frame, and the mounting bracket is provided on the vehicle body frame. The structure which has the contact surface (for example, contact surface a of embodiment) contact | abutted to the peripheral part of opening may be sufficient.

  In this case, since the mounting bracket contacts the peripheral edge of the opening of the vehicle body frame at the contact surface, the peripheral edge of the opening of the vehicle body frame can be reinforced by the contact surface to increase the rigidity of the peripheral edge. Furthermore, since the mounting bracket comes into contact with a wide range of the lower wall of the vehicle body frame, the cross-sectional deformation of the vehicle body frame can be advantageously suppressed.

  The vehicle body frame is a cross frame (for example, the cross member of the embodiment) that interconnects left and right side frames (for example, the rear side frame 2 and the vehicle body floor 5 of the embodiment) extending substantially along the vehicle body longitudinal direction. 6 and the vehicle body floor 5), and the cross frame is coupled to the corresponding left and right side frames, and a pair of side end members to which the mounting bracket is attached (for example, the side end members 6L, 6R) and a central member (for example, the central member 6C of the embodiment) that connects the pair of side end members to each other, and the side end member is set to have a plate thickness greater than that of the central member. You may make it.

  In this case, since the plate thickness of the side end member of the cross frame to which the mounting bracket is attached is thicker than the plate thickness of the central member connecting the pair of side end members, the plate thickness of the entire cross frame is similarly increased. Compared with the case where it does, the rigidity and intensity | strength of the attaching part of an attachment bracket can be improved, suppressing a weight increase and the rise in product cost. Furthermore, since the mounting bracket is attached to the side end member, the rigidity and strength in the vicinity of the joint portion of the cross frame with the side frame can be increased by the mounting bracket.

  The vehicle body frame is a cross frame (for example, the cross member of the embodiment) that interconnects left and right side frames (for example, the rear side frame 2 and the vehicle body floor 5 of the embodiment) extending substantially along the vehicle body longitudinal direction. 6 and the vehicle body floor 5), and the cross frame is coupled to the corresponding left and right side frames, and a pair of side end members to which the mounting bracket is attached (for example, the side end members 6L, 6R) and a central member (for example, central member 6C of the embodiment) that mutually connects the pair of side end members, and the side end member is configured by a member having higher strength than the central member. You may be made to do.

  In this case, since the side end member of the cross frame to which the mounting bracket is attached is composed of a member having higher strength than the central member that connects the pair of side end members, the cross frame has the same high strength member. Compared with the case where it comprises, sufficient rigidity and intensity | strength of the attaching part of an attachment bracket can be ensured, suppressing the rise in product cost. Furthermore, since the mounting bracket is attached to the side end member, the rigidity and strength in the vicinity of the joint portion of the cross frame with the side frame can be increased by the mounting bracket.

  The vehicle body frame includes left and right side frames (for example, the rear side frame 2 and the vehicle body floor 5 of the embodiment) that extend substantially along the vehicle body longitudinal direction, and a cross frame that connects the left and right side frames to each other. For example, the suspension member (for example, the shock absorber 15 of the embodiment) attached to the cross frame is provided on each of the left and right side frames. The mounting bracket to which another suspension component (for example, the spring 16 of the embodiment) is attached may be attached.

  In this case, since the two suspension components are attached to the cross frame and the side frame via the same attachment bracket, the rigidity and strength of the attachment portion of the entire suspension can be advantageously increased.

  The vehicle body frame is a cross frame (for example, the cross member 6 and the vehicle body floor 5 in the embodiment) that interconnects left and right side frames that extend substantially along the vehicle body longitudinal direction. A partition wall member (for example, the partition wall member 22 of the embodiment) for partitioning the inside of the cross frame is attached to the end edge of the cross frame, and the left and right end edges of the cross frame include the partition wall member and the corresponding left and right side frames. The closed space portion may be configured as described above, and the bracket main body of the mounting bracket may be disposed inside the closed space portion.

  In this case, a highly rigid closed space portion is configured by the left and right side frames and partition members at the left and right edges of the cross frame. Since the bracket main body is disposed inside the closed space portion, the mounting bracket is supported with high rigidity with respect to the edge of the cross frame.

  The partition member and the upper wall of the cross frame have a joint part (for example, the joint part b of the embodiment) joined to each other, and the vehicle interior fastening part of the mounting bracket is fixed to the joint part. You may make it.

  In this case, since the vehicle interior fastening portion of the mounting bracket is fixed to the joint portion between the partition member having high rigidity and the cross frame, the suspension component can be supported on the vehicle body frame with higher rigidity and strength.

  The vehicle body frame includes left and right side frames (for example, the rear side frame 2 and the vehicle body floor 5 of the embodiment) that extend substantially along the vehicle body longitudinal direction, and a cross frame that connects the left and right side frames to each other. For example, the cross member 6 of the embodiment and the vehicle body floor 5) and the connecting frame (for example, the outrigger 4 of the embodiment) that connects the left and right side frames to the corresponding left and right side sills (for example, the side sills 3 of the embodiment). And the vehicle body floor 5), and the suspension arm extends from the axle support portion (for example, the axle support portion 10 of the embodiment) to the inner side in the vehicle width direction (for example, of the embodiment). An inner arm portion 11) and an outer arm portion extending from the axle support portion toward the front of the vehicle body (for example, the outer arm portion 12 of the embodiment). The end of the inner arm portion on the inner side in the vehicle width direction is swingably supported on the inner side in the vehicle width direction of the cross frame, and the outer arm An end of the vehicle body on the front side of the vehicle body is supported by the connection frame so as to be swingable via a bush (for example, the bush 14 of the embodiment) that is the suspension component, and the inner arm portion and the cross frame, A shock absorber (for example, the shock absorber 15 of the embodiment) and a spring (for example, the spring 16 of the embodiment), which are the suspension parts, are interposed between the inner arm portion and the side frame. At least one of the absorber, the spring, and the front and rear bushes is attached to the body frame. It may be attached through the racket.

  In this case, in the semi-trailing suspension, the shock absorber, which is a suspension component, is disposed between the cross frame and the inner arm portion disposed below the cross frame, so that the shock absorber is located above the vehicle floor. Since it does not protrude in the house direction, it is possible to secure a large trunk room and the like accordingly. In addition, since at least one of the suspension parts of the shock absorber, the spring, and the bush is attached to the body frame via the mounting bracket, the suspension can be supported on the body frame with high rigidity, and the rigidity of the body frame can be increased. It can also be increased.

  The lower wall of the cross frame is recessed toward the vehicle body upper side, and has a groove portion (for example, the groove portion 24 in the embodiment) extending along the extending direction of the inner arm portion on the lower surface. An end portion on the inner side in the vehicle width direction may be swingably supported by the cross frame so that at least a part thereof faces the groove portion.

  In this case, interference between the inner arm portion and the cross frame during operation of the suspension can be avoided by the groove portion of the lower wall of the cross frame, so that the suspension arm can be obtained without significantly increasing the ground clearance on the lower surface of the vehicle. Suspension parts can be installed between the vehicle body frame and the vehicle body frame with a margin.

  The vehicle body frame includes left and right side frames (for example, the rear side frame 2 and the vehicle body floor 5 of the embodiment) that extend substantially along the vehicle body longitudinal direction, and a cross frame that connects the left and right side frames to each other. For example, the cross member 6 of the embodiment and the vehicle body floor 5), and the cross frame is joined to a body portion of the cross frame (for example, the cross member 6 of the embodiment) (for example, the vehicle body floor (for example, the cross member 6). Along with a vertical wall (for example, the vertical wall 5P-1 of the embodiment) of the vehicle body floor 5) of the embodiment, a closed cross-section portion (for example, a closed cross-section portion of the embodiment) whose center in the vehicle width direction is curved in the vehicle longitudinal direction in plan view 20), and a center tunnel portion (for example, the center of the embodiment) of the vehicle body floor in which a substantially central portion in the vehicle width direction of the closed cross section extends in the vehicle longitudinal direction. Tunnel portion 9) in the reinforcing member (e.g., it may be linked via a connecting plate 21) of the embodiment.

  In this case, the main body portion of the cross frame forms a closed cross-sectional portion curved in the longitudinal direction of the vehicle body together with the vertical wall of the vehicle body floor, and a substantially central portion in the vehicle width direction of the closed cross-sectional portion is a reinforcing member on the center tunnel portion of the vehicle body floor. Therefore, while suppressing the increase in the number of parts, it is possible to efficiently increase the rigidity of the vehicle body floor portion close to the cross frame, and the rigidity of the substantially central portion of the cross frame in the vehicle width direction is improved by the vehicle body floor. Can be increased.

According to the present invention, the bracket body disposed in the closed cross section of the vehicle body frame is fastened and fixed to the lower wall and the upper wall of the vehicle body frame by the vehicle outer side fastening portion and the vehicle inner side fastening portion, and is input to the suspension component. Since the load is distributed and supported on the plurality of walls of the body frame, the suspension component can be supported on the body frame with high rigidity and strength while suppressing an increase in the thickness of the mounting bracket. Further, according to the present invention, the mounting bracket can function as a member that reinforces the cross section of the vehicle body frame from the inside. Therefore, the rigidity of the cross section of the vehicle body frame can be increased by the mounting bracket.
Therefore, when the present invention is adopted, the vehicle body frame has a high rigidity and strength for the load input from the suspension parts while suppressing an increase in vehicle weight due to an increase in thickness and an increase in product cost due to an increase in the number of parts. Can be stably supported.

It is a perspective view which shows the vehicle body frame | skeleton part below the vehicle body rear part of the vehicle of one Embodiment of this invention. It is a bottom view of the vehicle body rear part of the vehicle of one Embodiment of this invention. FIG. 3 is a bottom view in which a part of the parts around the suspension of FIG. It is the perspective view which removed a part of vehicle body floor of the vehicle body rear part of the vehicle of one Embodiment of this invention. 1 is a perspective view showing a suspension of a vehicle according to an embodiment of the present invention. FIG. 5 is a perspective view showing a rear part of a vehicle body according to an embodiment of the present invention in a section taken along a VI-VI section line portion of FIG. 3. It is the perspective view which showed the vehicle body rear part of the vehicle of one Embodiment of this invention in the cross section by the VII-VII sectional line part of FIG. It is a perspective view of the suspension component of one Embodiment of this invention. It is sectional drawing which follows the IX-IX line of FIG. 3 of the vehicle body rear part of the vehicle of one Embodiment of this invention. It is sectional drawing which follows the XX line of FIG. 3 of the vehicle body rear part of the vehicle of one Embodiment of this invention. It is sectional drawing which follows the XI-XI line of FIG. 3 of the vehicle body rear part of the vehicle of one Embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the arrow FR in a figure points out the front of the vehicle 1, and the arrows UP and LH point out above and the left side of the vehicle 1, respectively.

FIG. 1 is a view of a skeleton portion below the rear portion of the vehicle 1 according to the present embodiment as viewed from the diagonally upper right side. FIG. 2 is a view of the rear portion of the vehicle 1 as viewed from the lower surface side, and FIG. 3 is a view of the vehicle 1 from which the parts around the rear suspension RS are partially removed as viewed from the lower surface side. 4 is a view in which a part of the vehicle body floor 5 is removed from FIGS.
In the vehicle 1, rear side frames 2 that extend substantially along the longitudinal direction of the vehicle body are disposed on the left and right sides of the rear portion of the vehicle body. In addition, side sills 3 that are strength members below the side portions of the vehicle body are disposed on both the left and right sides of the center portion of the vehicle body. The left and right rear side frames 2 are arranged on the inner side in the vehicle width direction with respect to the side sill 3, and the front edge portions of the left and right rear side frames 2 are rear end portions of the corresponding left and right side sills 3 by the outriggers 4 that are connecting frames. It is connected to. In addition, the rear side portions of the left and right rear side frames 2 slightly behind the joints are connected to each other by a cross member 6 extending in the vehicle width direction.

  A vehicle body floor 5 is placed on the upper surfaces of the left and right rear side frames 2 and the cross member 6, and the vehicle body floor 5 is fixed to these upper surfaces by welding or the like. The left and right rear side frames 2 are formed in a concave cross-sectional shape that opens upward, and the vehicle body floor 5 is joined to the upper surface side thereof, thereby forming a substantially rectangular closed cross section together with the vehicle body floor 5. In the case of the present embodiment, the rear side frame 2 constitutes a side frame in which the closed cross section extends substantially along the longitudinal direction of the vehicle body in a state where the vehicle body floor 5 is joined to the upper surface side.

  Similarly, the cross member 6 is formed in a concave cross-sectional shape that opens upward, and the vehicle body floor 5 is joined to the upper surface side of the cross member 6 to form a substantially rectangular closed cross section together with the vehicle body floor 5. In the case of the present embodiment, the cross member 6 constitutes a cross frame in which the closed cross section 20 extends along the vehicle width direction in a state where the vehicle body floor 5 is joined to the upper surface side. The cross member 6 constitutes the main body of the cross frame.

In the present embodiment, the outrigger 4 is also formed in a concave cross-sectional shape that opens upward. The outrigger 4 forms a closed section together with the vehicle body floor 5 by welding the vehicle body floor 5 to the upper surface side thereof. In the case of the present embodiment, the outrigger 4 constitutes a connecting frame that connects the side sill 3 and the side frame in a state where the vehicle body floor 5 is joined to the upper surface side.
The left and right rear side frames 2, the cross member 6, and the outrigger 4 constitute a vehicle body frame having a closed cross-section structure by joining a vehicle body floor 5 to the upper surfaces thereof.

A region on the front side of the cross member 6 on the vehicle body floor 5 is a floor portion of a passenger compartment on which a passenger enters, and a region on the rear side of the cross member 6 is a floor portion of a cargo compartment. The floor portion of the luggage compartment is recessed downward, and the recessed portion serves as a tire pan 5P that houses a spare tire. In addition, a rear wheel house 8 that covers the upper part of the left and right rear wheels Wr is joined to the vehicle width direction outer regions of the left and right side frames 2 of the vehicle body floor 5.
A center tunnel portion 9 is formed in front of the cross member 6 of the vehicle body floor 5. The center tunnel portion 9 is formed such that a U-shaped cross section with the opening facing downward is continuous in the vehicle longitudinal direction at a substantially center of the vehicle body floor 5 in the vehicle width direction.

FIG. 5 is a view showing the rear suspension RS of the vehicle 1.
The rear suspension RS includes an inner arm portion 11 that extends inward in the vehicle width direction from the axle support portion 10 that supports the axle of the rear wheel Wr, an outer arm portion 12 that extends from the axle support portion 10 to the front side of the vehicle body, Is a semi-trailing suspension. In the present embodiment, the inner arm portion 11 and the outer arm portion 12 constitute a suspension arm of the rear suspension RS.

  An end portion on the inner side in the vehicle width direction of the inner arm portion 11 is attached to the lower surface side of the inner region in the vehicle width direction of the cross member 6 via a bush 13 so as to be swingable. The end of the outer arm 11 on the vehicle body front side is attached to the lower surface side of the outrigger 4 via a bush 14 so as to be swingable. The bushes 13 and 14 have a rubber elastic portion between the shaft portion and the cylinder portion, and absorb the input vibration and impact by the rubber elastic portion.

As shown in FIG. 2, the inner arm portion 11 is disposed on the lower side of the cross member 6 along the extending direction of the cross member 6. The lower ends of the shock absorber 15 and the spring 16 for absorbing the input load from the rear wheel Wr are attached to the upper surface of the substantially central portion in the extending direction of the inner arm portion 11 in parallel in the vehicle width direction. Yes. An upper end portion of the shock absorber 15 is attached to the cross member 6 via a mounting bracket 17, and each upper end portion of the spring 16 is attached to the rear side frame 2 via another mounting bracket 18.
In the present embodiment, the shock absorber 15 and the spring 16 together with the bushes 13 and 14 constitute a suspension component.

6 is a cross-sectional view of the rear portion of the vehicle body taken along the line VI-VI in FIG. 3, and the vicinity of the joint portion between the cross member 6 and the rear side frame 2 is viewed from diagonally downward to the front. FIG. FIG. 5 is a cross-sectional view taken along the line VII-VII in FIG. 4, and the vicinity of the joint between the cross member 6 and the rear side frame 2 is viewed from the front obliquely upper left side.
As shown in FIGS. 2 and 3, the cross member 6 connects the pair of side end members 6L and 6R and the pair of side end members 6L and 6R that are disposed at positions separated from each other in the vehicle width direction. A central member 6C. The left and right side end members 6L and 6R are coupled to the corresponding left and right rear side frames 2 by welding or the like.
The left and right side end members 6L, 6R and the central member 6C have a basic cross-sectional shape that opens concavely upward. The vehicle body floor 5 is joined to a part of the upper surface side and the rear surface of the side end members 6L and 6R and the central member 6C.

  As shown in FIGS. 1 to 3, the tire pan 5 </ b> P of the vehicle body floor 5 has a vertical wall 5 </ b> P- 1 that rises upward from the front portion of the bottom wall. This front-side vertical wall 5P-1 is curved in a convex shape in plan view so that the central region in the vehicle width direction bulges forward.

  The cross member 6 has a center region in the vehicle width direction convexly curved forward in plan view so as to follow the curved shape of the vertical wall 5P-1 of the tire pan 5P. The upper surface side of the cross member 6 is closed by an upper wall continuous to the vertical wall 5P-1 of the tire pan 5P of the vehicle body floor 5, and a part of the rear surface side of the cross member 6 is vertical wall 5P-1 of the tire pan 5P. It is blocked by The cross member 6 thus forms a closed cross section 20 together with the vehicle body floor 5, and the closed cross section 20 is curved so that the central region in the vehicle width direction is convex forward. A substantially central portion in the vehicle width direction of the lower wall of the cross member 6 constituting the closed cross-section portion 20 is connected to a center tunnel portion 9 at the center of the vehicle body floor 5 by a connection plate 21 that is a reinforcing member.

In the case of this embodiment, the cross member 6 is constituted by the left and right side end members 6L, 6R and the central member 6C that connects the left and right side end members 6L, 6R as described above. The side end members 6L, 6R and the central member 6C have different plate thicknesses. That is, the plate thickness of the left and right side end members 6L and 6R is thicker than the plate thickness of the plate member of the central member 6C.
In the present embodiment, the left and right side end members 6L, 6R and the central member 6C have different thicknesses, but the left and right side end members 6L, 6R and the central member 6C have the same thickness. The left and right side end members 6L and 6R may be made of a material having higher strength than the central member 6C.

  Between the left and right side end members 6L and 6R of the cross member 6 and the vehicle body floor 5 covering the upper surface thereof, as shown in FIGS. 6, 7 and 9, a position close to the joint with the rear side frame 2 is provided. , A partition wall member 22 for partitioning the inside of the closed section 20 in the vehicle width direction is interposed. The partition wall member 22 is joined to one of the side end members 6L and 6R, the vehicle body floor 5, and the corresponding rear side frames 2 on the left and right. Accordingly, the left and right side end members 6L and 6R and the vehicle body panel 5 constitute a closed space portion 23 by the corresponding left and right rear side frames 2 and the partition wall member 22.

  Further, as shown in FIGS. 2, 3 and 7, the center member 6C of the cross member 6 is depressed toward the upper side of the vehicle body and extends along the extending direction of the inner arm portion 11 of the left and right rear suspension RS. A protruding groove 24 is formed on the lower surface. The ends on the inner side in the vehicle width direction of the left and right inner arms 11 are attached to the side edges of the groove 24 so that at least a part thereof faces the groove 24.

8 is a view showing the mounting bracket 17 attached to the upper end of the shock absorber 15. FIGS. 9 and 10 are cross sections taken along the line IX-IX and the line XX in FIG. FIG.
The mounting bracket 17 is coupled to the left and right side end members 6L and 6R of the cross member 6 and the vehicle body floor 5 above the side end members 6L and 6R. In other words, the mounting bracket 17 is coupled to the lower wall 20l and the upper wall 20u of the closed cross section 20 formed by the cross member 6 and the vehicle body frame 5.

  The mounting bracket 17 includes a bottomed cylindrical bracket body 17A to which the upper end portion of the shock absorber 15 is attached, a pair of fastening flanges 17B extending radially outward from the lower end of the bracket body 17A, and the bracket body 17A. And a fastening plate 17C fixed by welding or the like to the top of the plate.

An opening 25 for inserting the fastening plate 17C of the mounting bracket 17 and the bracket main body 17A into the closed cross section 20 is formed in the lower wall 201 of the closed cross section 20 in the vicinity of both ends (side end members 6L and 6R). Yes.
In the state where the fastening plate 17C and the bracket main body 17A are inserted into the closed cross-section portion 20 through the opening 25, the mounting bracket 17 is closed by the fastening member 26 such as a bolt and a nut. The fastening flange 17B at the lower end of the bracket body 17A is fixed to the lower wall 20l of the closed section 20 by a fastening member 27 such as a bolt and a nut.
In the case of this embodiment, the vehicle outer side fastening portion fastened to the lower wall of the vehicle body frame is constituted by the fastening flange 17B, and the vehicle inner side fastening portion fastened to the upper wall of the vehicle body frame is constituted by the fastening plate 17C. Has been.

  Further, a connecting flange 17D is provided at the lower end of the mounting bracket 17 to connect the pair of fastening flanges 17B to each other at the outer peripheral portion of the bracket body 17A. The upper surfaces of the fastening flange 17B and the connection flange 17D are formed flush with each other, and the upper surfaces of both are in contact with the lower wall 20l of the closed cross-sectional portion 20 at the outer peripheral portion of the opening 25. In the case of the present embodiment, the continuous upper surface of the fastening flange 17 </ b> B and the connecting flange 17 </ b> D is a contact surface a that contacts the peripheral edge of the opening 25.

  The mounting bracket 17 is disposed in a closed space portion 23 sandwiched between the partition wall member 22 and the rear side frame 2 in the closed cross-section portion 20 of the cross frame. Further, the partition wall member 22 has a bent leg wall 22 a that is joined to the lower surface of the vehicle body floor 5 at a position facing the closed space portion 23. The fastening plate 17 </ b> C of the mounting bracket 17 is fixed to the joint b between the bent wall 22 a of the partition wall member 22 and the vehicle body floor 5 by a fastening member 26.

11 is a diagram showing a cross section taken along line XI-XI in FIG.
As shown in FIG. 11, the mounting bracket 18 for mounting the upper end of the spring 16 to the vehicle body frame is in a state where the upper projecting portion 18 </ b> A- 1 is inserted and disposed within the closed cross section of the rear side frame 2 and the vehicle body floor 5. A bracket body 18A that holds the upper end of the spring 16, a fastening flange 18B that fastens the bracket body 18A to the lower wall 2l of the rear side frame 2, and a bracket body 18A that is fastened to the vehicle body floor 5 above the upper protrusion 18A-1. A fastening wall 18C. In the mounting bracket 18, the fastening flange 18 </ b> B constitutes the vehicle exterior fastening portion, and the fastening wall 18 </ b> C constitutes the vehicle interior fastening wall.

  In the lower wall 21 of the rear side frame 2, an opening 28 into which the upward projecting portion 18 </ b> A- 1 of the bracket body 18 </ b> A of the mounting bracket 18 is inserted is formed. In the mounting bracket 18, the upper projecting portion 18 </ b> A- 1 of the bracket body 18 </ b> A is inserted into the closed cross section of the rear side frame 2 and the vehicle body floor 5 through the opening 28, and in this state, the fastening flange 18 </ b> B The fastening wall 27 </ b> C is fastened and fixed to the vehicle body floor 5 by the fastening member 26. In addition, the contact surface a which contact | connects the peripheral part of the lower surface side of the opening 28 of the lower wall 21 is provided in the upper surface of the fastening flange 18B.

  As described above, in the suspension support structure of this embodiment, the bracket main bodies 17A and 18A in which the mounting brackets 17 and 18 that hold the upper ends of the shock absorber 15 and the spring 16 are disposed within the closed cross section of the vehicle body frame. A vehicle outer side fastening portion (fastening flange 17B, fastening flange 18B) for fastening the bracket main bodies 17A, 18A to the lower wall of the vehicle body frame, and a vehicle inner side fastening portion for fastening the bracket main bodies 17A, 18A to the upper wall of the vehicle body frame ( It has a fastening plate 17C and a fastening wall 18C). For this reason, the load input to the shock absorber 15 and the spring 16 can be dispersed and supported on the plurality of walls of the vehicle body frame having a closed cross-sectional structure. Therefore, in the suspension support structure of the present embodiment, the suspension component can be supported on the vehicle body frame with high rigidity and strength while suppressing an increase in the thickness of the mounting brackets 17 and 18.

Further, in the suspension support portion structure of the present embodiment, the mounting brackets 17 and 18 can function as members that reinforce the cross section of the body frame from the inside. For this reason, the mounting brackets 17 and 18 can increase the rigidity of the cross section of the body frame.
Therefore, when the suspension support structure of the present embodiment is adopted, the load input from the suspension component is increased while suppressing the increase in vehicle weight due to the increase in the thickness of the component and the increase in product cost due to the increase in the number of components. It can be supported stably on the body frame with rigidity and strength.

In the suspension support structure of the present embodiment, openings 25 and 28 for inserting the bracket bodies 17A and 18A of the mounting brackets 17 and 18 are respectively inserted into the cross member 6 and the lower walls 20l and 2l of the rear side frame 2. The fastening flange 17B and the connecting flange 17D of the mounting bracket 17 and the fastening flange 18B of the mounting bracket 18 are provided on the peripheral portion on the lower surface side of the opening 25 of the cross member 6 and the peripheral portion on the lower surface side of the rear side frame 2. An abutting surface a that abuts is provided. For this reason, the peripheral portions of the openings 25 and 28 of the lower walls 20l and 2l of the cross member 6 and the rear side frame 2 are reinforced by the contact surfaces a of the mounting brackets 17 and 18, respectively. The rigidity of the peripheral part of 28 can be improved.
Further, in the case of the suspension support structure of the present embodiment, the contact surfaces a of the mounting brackets 17 and 18 are wide with respect to the openings 28 and 28 with respect to the cross member 6 and the lower walls 20l and 21 of the rear side frame 2. Since the contact is made in the range, the cross-sectional deformation of the cross member 6 and the rear side frame 2 can be advantageously suppressed.

In the suspension support structure of the present embodiment, the cross member 6 constituting the cross frame together with the vehicle body floor 5 includes a pair of side end members 6L and 6R coupled to the left and right rear side frames 2, and a pair of side ends. A central member 6C for connecting the members 6L and 6R to each other, and a mounting bracket 17 for mounting a shock absorber is attached to each of the pair of side end members 6L and 6R, and each of the side end members 6L and 6R The plate thickness is set to be thicker than the plate thickness of the central member 6C. For this reason, the rigidity and strength of the mounting portion of the mounting bracket 17 can be increased while suppressing an increase in weight and an increase in product cost, as compared with the case where the thickness of the entire area of the cross member 6 is similarly increased.
Furthermore, in the case of the suspension support portion structure of the present embodiment, the cross member 6 is attached to the side end members 6L and 6R having a large plate thickness and high rigidity and strength because the mounting bracket 17 that also functions as a reinforcing member is attached. The rigidity and strength in the vicinity of the joint with the rear side frame 2 can be further increased.
Can.

  Instead of setting the plate thickness of the side end members 6L and 6R of the cross member 6 to be thicker than the plate thickness of the central member 6C, the side end members 6L and 6R are configured by members having higher strength than the central member 6C. In this case, the rigidity and strength of the mounting portion of the mounting bracket 17 can be increased while suppressing an increase in product cost as compared with the case where the entire area of the cross member 6 is similarly configured by a member having high strength. Also in this case, the mounting bracket 17 that also functions as a reinforcing member is attached to the high-strength side end members 6L and 6R, so that the rigidity and strength in the vicinity of the joint portion of the cross member 6 with the rear side frame 2 are advantageous. Can be increased.

In the case of the suspension support portion structure of the present embodiment, the shock absorber 15 and the spring 16 which are suspension parts are closed cross-section portions formed by the cross member 6 and the vehicle body floor 5 via mounting brackets 17 and 18 having the same structure, respectively. And a closed cross section formed by the rear side frame 2 and the vehicle body floor 5. For this reason, the rigidity and strength of the entire mounting portion of the rear suspension RS can be advantageously increased.
Note that the structure in which the mounting bracket is fastened and fixed to the lower wall and the upper wall of the closed cross section of the vehicle body frame can be employed only in either the mounting portion of the shock absorber 15 or the mounting portion of the spring 16.

  Further, in the suspension support structure of the present embodiment, the partition member 22 is attached to the left and right edges of the cross frame formed by joining the cross member 6 and the vehicle body floor 5, and is separated by the partition member 22 and the rear side frame 2. The closed space portion 23 is formed at the left and right edges of the cross frame, and the bracket body 17A of the mounting bracket 17 for mounting the shock absorber is disposed inside the closed space portion 23. For this reason, in the case of the suspension support portion structure of this embodiment, the mounting bracket 17 is attached to the portion whose rigidity is increased by the closed space portion 23, and the suspension component can be supported with high rigidity by the cross frame. become.

  Further, in this embodiment, the fastening plate 17C of the mounting bracket 17 is fastened and fixed to the joint portion b between the partition member 22 having high rigidity and the upper wall 20u of the cross frame. It can be supported on the body frame with high strength.

Further, in the present embodiment, the rear suspension RS is constituted by a semi-tray link type sun pension, and the end portion on the inner side in the vehicle width direction of the inner arm portion 11 is supported so as to be swingable on the inner side in the vehicle width direction of the cross member 6. An end of the outer arm portion 12 on the vehicle body front side is supported by a connecting frame formed of the outrigger 4 and the vehicle body floor 5 via a bush 14 so as to be swingable, and between the inner arm portion 11 and the cross frame, A shock absorber 15 and a spring 16 are interposed between the inner arm portion 11 and the side frame. A shock absorber 15 and a spring 16 which are suspension parts are attached to the closed cross-section portion of the cross frame and the closed cross-section portion of the side frame via mounting brackets 17 and 18, respectively.
In the rear suspension RS of the present embodiment, since the shock absorber 15 is disposed between the cross frame and the inner arm portion 11 disposed below the cross frame, the shock absorber 15 that is a suspension component is mounted on the vehicle body floor 5. Will not protrude in the direction of the upper rear wheel house 8. For this reason, by adopting the rear suspension RS according to the present embodiment, it becomes possible to secure a wide trunk room or the like on the vehicle body floor 5.

In the present embodiment, the shock absorber 15 and the spring 16 that are suspension parts are attached to the closed cross section of the vehicle body frame via the attachment brackets 17 and 18, but the bush arranged at the end of the outer arm portion 12. 14 may be attached to the closed cross section of the vehicle body frame via a similar mounting bracket.
Further, any one of the shock absorber 15, the spring 16, and the bush 14, or any two of them may be attached to the vehicle body frame via the mounting bracket as described above.

  Further, in the suspension support portion structure of the present embodiment, the groove portion 24 extending along the extending direction of the inner arm portion 11 is provided on the lower surface side of the cross member 6 constituting the cross frame, and the inner arm portion 11 is provided. An end portion on the inner side in the vehicle width direction is swingably supported by the cross member 6 so that at least a part of the end portion faces the groove portion 24. For this reason, it is possible to avoid interference between the inner arm portion 11 and the cross member 6 during the operation of the suspension by the groove portion 24 while adopting the rear suspension RS in which the inner arm portion 11 is disposed below the cross member 6. it can. Therefore, by adopting this configuration, it is possible to install the suspension parts with a margin between the inner arm portion 11 and the cross member 6 without significantly increasing the ground clearance on the lower surface of the vehicle.

  In the suspension support structure of the present embodiment, the cross member 6 has a center in the vehicle width direction in plan view together with the vertical wall 5P-1 of the tire pan 5P (vehicle body floor 5) joined to the cross member 6. A closed cross-section portion 20 that is convexly curved forward is formed, and a substantially central portion in the vehicle width direction of the closed cross-section portion 20 is connected to the center tunnel portion 9 of the vehicle body floor 5 via a connection plate 21. . As a result, the cross member 6 forms a closed cross-section portion 20 curved forward of the vehicle body together with the vertical wall 5P-1 of the vehicle body floor 5, and the substantially central portion in the vehicle width direction of the closed cross-section portion 20 connects the connecting plate 21. To the center tunnel portion 9 having high rigidity. Therefore, by adopting this configuration, it is possible to efficiently increase the rigidity of the vehicle body floor 5 portion adjacent to the cross member 6 while suppressing an increase in the number of parts, and to substantially increase the rigidity of the cross member 6 in the vehicle width direction. The rigidity of the vehicle body can also be increased by the vehicle body floor 5.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary.

2 ... Rear side frame (side frame, body frame)
2l ... lower wall 3 ... side sill (body frame)
4. Outrigger (connection frame, body frame)
6 ... Cross member (main part, cross frame)
6L, 6R ... Side end member 6C ... Center member 9 ... Center tunnel part 10 ... Axle support part 11 ... Inner arm part (suspension arm)
12 ... Outer arm (suspension arm)
14 ... Bush (suspension parts)
15 ... Shock absorber (suspension parts)
16 ... Spring (suspension part)
17, 18 ... Mounting bracket 17A ... Bracket body 17B ... Fastening flange (vehicle outer side fastening part)
17C ... Fastening plate (inner side fastening part)
18A ... Bracket body 18B ... Fastening flange (vehicle outer fastening part)
18C ... Fastening wall (inner side fastening part)
20 ... Closed section 20l ... Lower wall 20u ... Upper wall 21 ... Connection plate (reinforcing member)
22 ... partition member 23 ... closed space 24 ... groove 25, 28 ... opening a ... contact surface

Claims (10)

A vehicle body frame having a closed cross-sectional structure having an upper wall facing the passenger compartment side and a lower wall facing the lower outer side of the passenger compartment;
A suspension arm supported swingably below the vehicle body;
A suspension component that is interposed between the suspension arm and the vehicle body frame and receives an input load acting on the suspension arm;
A mounting bracket for attaching the upper part of the suspension part to the vehicle body frame,
The mounting bracket is
A bracket body inserted and arranged in a closed cross section of the body frame to hold the upper part of the suspension component;
A vehicle outer side fastening portion for fastening the bracket body to the lower wall of the body frame;
A suspension mounting portion structure for a vehicle, comprising: a vehicle interior fastening portion that fastens the bracket body to the upper wall of the vehicle body frame. The lower wall of the body frame is provided with an opening for inserting the bracket body into the closed cross section of the body frame,
The suspension mounting portion structure for a vehicle according to claim 1, wherein the mounting bracket has a contact surface that contacts a peripheral portion of the opening of the body frame. The vehicle body frame is a cross frame that interconnects left and right side frames that extend substantially along the vehicle longitudinal direction,
The cross frame is
A pair of side end members coupled to the corresponding left and right side frames and to which the mounting bracket is attached;
A central member that interconnects the pair of side end members,
The suspension mounting portion structure for a vehicle according to claim 1 or 2, wherein the side end member is set to have a plate thickness larger than that of the central member. The vehicle body frame is a cross frame that interconnects left and right side frames that extend substantially along the vehicle longitudinal direction,
The cross frame is
A pair of side end members coupled to the corresponding left and right side frames and to which the mounting bracket is attached;
A central member that interconnects the pair of side end members,
3. The suspension mounting portion structure for a vehicle according to claim 1, wherein the side end member is configured by a member having higher strength than the central member. The vehicle body frame includes left and right side frames extending substantially along the vehicle longitudinal direction, and a cross frame that connects the left and right side frames to each other.
The mounting bracket to which a suspension part different from the suspension part to be attached to the cross frame is attached to each of the left and right side frames. The suspension mounting part structure for a vehicle as described in 1. The vehicle body frame is a cross frame that interconnects left and right side frames that extend substantially along the vehicle longitudinal direction,
Partition members that partition the cross frame are attached to the left and right edges of the cross frame,
The left and right edges of the cross frame form a closed space portion by the partition member and the corresponding left and right side frames, and the bracket body of the mounting bracket is disposed inside the closed space portion. The suspension mounting part structure for a vehicle according to any one of claims 1 to 5, wherein The partition member and the upper wall of the cross frame have a joint portion joined to each other,
The suspension mounting portion structure for a vehicle according to claim 6, wherein the vehicle interior fastening portion of the mounting bracket is fixed to the joint portion. The vehicle body frame includes left and right side frames extending substantially along the longitudinal direction of the vehicle body, a cross frame that connects the left and right side frames to each other, and a connection that connects the left and right side frames to corresponding left and right side sills. A frame, and
The suspension arm is a component constituting a semi-trailing suspension having an inner arm portion extending inward in the vehicle width direction from the axle support portion and an outer arm portion extending from the axle support portion to the vehicle body front side. And
An end portion on the inner side in the vehicle width direction of the inner arm portion is supported so as to be swingable on the inner side in the vehicle width direction of the cross frame,
An end of the outer arm on the vehicle body front side is swingably supported by the connection frame via a bush that is the suspension component.
Between each of the inner arm part and the cross frame, the inner arm part and the side frame, a shock absorber and a spring which are the suspension parts are interposed,
The vehicle suspension mounting according to any one of claims 1 to 7, wherein at least one of the shock absorber, the spring, and the bush is attached to a vehicle body frame via the mounting bracket. Part structure. The lower wall of the cross frame is recessed toward the vehicle body upper side, and has a groove portion on the lower surface extending along the extending direction of the inner arm portion,
9. The vehicle according to claim 8, wherein an end of the inner arm portion on the inner side in the vehicle width direction is swingably supported by the cross frame so that at least a part thereof faces the groove portion. Suspension mounting structure. The vehicle body frame includes left and right side frames extending substantially along the vehicle longitudinal direction, and a cross frame that connects the left and right side frames to each other.
The cross frame, together with the vertical wall of the vehicle body floor joined to the main body portion of the cross frame, constitutes a closed cross-sectional portion whose center in the vehicle width direction is curved in the vehicle longitudinal direction in plan view,
The substantially central portion in the vehicle width direction of the closed cross-section portion is connected to a center tunnel portion of the vehicle body floor extending in the vehicle longitudinal direction by a reinforcing member. The suspension mounting part structure for a vehicle as described in 1.

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