JPH055108Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to improvements in suspension support structures for automobiles.

[Conventional technology]

A conventional rear suspension, for example a MacPherson strut type suspension as shown in FIG. 5, is used as a rear suspension S of a front-wheel drive vehicle (front-engine, front-drive vehicle). This rear suspension S is of a dual link type and includes a pair of suspension arms 1A and 1B in the front and rear directions. The suspension arms 1A, 1B extend toward the center in the width direction of the vehicle body, and their tips are pivotally supported by a shaft 3 on the rear suspension member 2 so as to be swingable. Here, the rear suspension member 2 is usually
It is fastened to the lower surface of the rear side frame 4 at both ends in the vehicle width direction with bolts and nuts. In FIG. 5, reference numeral 5 indicates a shock absorber, 6 a coil spring, 7 a strut rod, 8 a stabilizer, and 9 a brake disc. While the automobile is running, the rear suspension S is subjected to vibrations or loads not only in the vertical direction but also in the vehicle width direction and the longitudinal direction. Here, as mentioned above, the suspension arms 1A, 1B are connected to the rear suspension member 2 by the shaft 3.
The rear suspension member 2 receives the force applied to the suspension arms 1A and 1B. As shown in the figure, since the rear suspension member 2 is long in the vehicle width direction, it has relatively high rigidity against loads in the vertical direction and loads in the vehicle width direction.

[Problem that the invention attempts to solve]

However, rear suspension member 2
As shown in the figure, the vehicle body is narrow in the front and back direction,
Also, the rear suspension arms 1A and 1B are connected to the shaft 3.
, that is, the point of application of the force from the suspension S is located far away downward from the lower surface of the rear side frame 4, which is the support point of the rear suspension member 2. Due to the load, rear suspension member 2
However, as shown in FIG. 6, there is a problem in that the rear side frame 4 tends to swing in the longitudinal direction of the vehicle centering on the lower surface, which hinders improvement in the steering stability of the vehicle. A large load in the vehicle width direction is applied to the rear suspension member 2 via the suspension arms 1A and 1B, and this load is transmitted to the rear side frame 4 via the rear suspension member 2. In this example, a cross member 10 is attached directly above the rear suspension member 2 so as to extend between the left and right rear side frames 4, thereby reinforcing the rigidity of the rear side frame 4. Therefore, in such a vehicle, even if an attempt is made to connect the rear suspension member 2 to a strong part on the body side in order to strengthen the rigidity of the rear suspension member 2, the cross member 10, which is the strong part, Since the rear suspension member 2 is located directly above the suspension member 2, there was a problem in that even if the two were connected in the vertical direction, the joint rigidity of the rear suspension member 2 in the longitudinal direction of the vehicle body could not be increased. On the other hand, for example, the suspension member is attached to the side member offset in the longitudinal direction of the vehicle body with respect to the cross member, and the central part in the width direction is curved to the position of the cross member and connected to the cross member. However, new problems arise in that the rigidity of the suspension member is reduced and the suspension arm is shortened. Furthermore, as described above, since the cross member 10 is located directly above the rear suspension member 2, the downwardly protruding portion of the luggage room (not shown), which is normally located behind the cross member 10, In other words, there is an underfloor space (not shown) for storing spare tires etc. due to the presence of the cross member 10.
There was a problem in that it could not be formed large in the front. Similar problems also occur when a fuel tank is provided behind the cross member or when a spare tire is suspended and supported below a floor panel.

[Purpose of invention]

This invention was made in view of the above-mentioned conventional problems, and is an automobile suspension that improves the steering stability of the automobile by increasing the rigidity of the suspension member in the longitudinal direction of the vehicle body. The purpose is to provide a supporting structure. Also, a suspension support for an automobile in which the suspension member can be connected to a cross member to strengthen its longitudinal rigidity without reducing its rigidity or shortening the suspension arm. The purpose is to provide structure. Another object of the present invention is to provide a suspension support structure for an automobile in which an underfloor storage space in a luggage room behind a cross member, a spare tire storage space, or a fuel tank space can be expanded toward the front of the vehicle body.

[Means to solve the problem]

This invention includes a suspension member that is attached to the lower part of the vehicle body and is long in the width direction of the vehicle body. In an automobile suspension support structure that is swingably supported via a shaft, the suspension member is linear and at least partially overlaps a cross member of the vehicle body in the longitudinal direction of the vehicle body. In the position to
Connected to the vehicle body at both ends in the vehicle width direction, and
The cross member has a concave side surface on the side of the suspension arm, and is arranged such that its center in the longitudinal direction of the vehicle body is offset from the center of the suspension member in the longitudinal direction of the vehicle body in a direction opposite to the suspension arm. A substantially central portion of the member in the vehicle body width direction is connected to the cross member by a bracket, thereby achieving the above object. Further, the cross member is arranged upwardly offset from the suspension member,
The bracket achieves the above object by connecting the cross member side surface, lower surface, and upper surface of the suspension member to the lower surface of the cross member. Further, the suspension is a rear suspension, and behind the cross member, an underfloor storage section of the luggage room is protruded below the floor panel along the rear recess of the cross member, and the suspension The housing member is disposed in the vehicle width direction through the lower side of the front part of the bottom surface of the underfloor storage section, and is fixed to the lower side of the left and right side members at both ends in the vehicle body width direction, and the bracket is
The above object is achieved by arranging the underfloor storage section in a curved manner along the front end corner.

[Effect]

This idea connects the suspension member to the cross member by a bracket, and offsets the cross member from the suspension member in the longitudinal direction of the vehicle body, so that the support point of the bracket by the cross member is located between the bracket and the suspension. The suspension member is offset in the longitudinal direction of the vehicle body with respect to the connection point with the member, thereby increasing the rigidity of the suspension member in the longitudinal direction of the vehicle body, so that the suspension member swings in the longitudinal direction of the vehicle body. This is to prevent this and improve the steering stability of the vehicle. Here, one side of the cross member, which originally has high rigidity, is made concave to obtain an offset, so there is no decrease in the rigidity of the cross member, and since the suspension member is straight, there is no decrease in rigidity. , there is no need to shorten the suspension arm. In addition, by making the rear surface of the cross member, which is provided to reinforce the attachment point of the suspension member to the side member, concave, the space under the floor of the luggage room located behind the cross member and the fuel can be reduced. The tank or spare tire storage space can be expanded forward.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 4, this embodiment includes a suspension member 12 that is attached to the lower part of the vehicle body and is long in the vehicle width direction. Attach the tip of the existing suspension arm 14 to the suspension member 12, and connect it to the shaft 1 in the longitudinal direction of the vehicle body.
The suspension support structure for an automobile is provided with a bracket 20 that connects a substantially central portion of the suspension member 12 in the width direction of the vehicle body to a cross member 18 of the vehicle body. . The cross member 18 and the suspension member 12 are located at a position where they partially overlap in the longitudinal direction of the vehicle body,
That is, the rear sides of both ends of the cross member 18 in the vehicle width direction overlap the front sides of both ends of the suspension member 12 in the vehicle width direction, as shown in FIG. It is connected to the side member 22. The cross member 18 is arranged offset to the front of the vehicle body with respect to the suspension member 12, and a rear recessed portion 18A is formed in the center portion of the rear side surface in the width direction of the vehicle body so as to be convex forward. . The bracket 20 connects the front portion of the suspension member 12 at the center in the vehicle width direction to the lower surface of the cross member 18 at the center in the vehicle width direction by bolts and nuts 24A, 24B. Here, the suspension is a rear suspension similar to that shown in FIG.
Along the rear recess 18A, the luggage room 2
The underfloor storage section 27 of No. 6 protrudes below the floor panel 28 and is connected to the suspension member 12.
are arranged in the vehicle width direction through the front lower side of the bottom surface 27A of the underfloor storage section 27, and are connected to the left and right side members 22 at both ends in the vehicle width direction.
The bracket 20 is curved and arranged along the front corner 27B of the underfloor storage section 27. The brackets 20 are provided at two locations in the widthwise central portion of the suspension member 12, and in the widthwise central portion of the suspension member 12, at the center in the vehicle body width direction of the shaft 16 for attaching the front suspension arm 14. The suspension member 12
It is tightened and fixed at two locations at the lower front side of the body with bolts and nuts 24A and 24B, respectively. Further, the bracket 20 is tightened to the cross member 18 at two locations at the center in the width direction of the vehicle body. In this embodiment, as described above, since the intermediate portion of the suspension member 12 in the vehicle width direction is connected to the cross member 18 via the bracket 20, the side member 2 of the cross member 18
The support rigidity of the suspension arm 14 by the suspension member 12 can be increased by effectively suppressing the swinging of the vehicle body in the longitudinal direction around the tightening point of the suspension member 12. Further, in this embodiment, the cross member 18
is slightly offset forward with respect to the suspension member 12, and the center portion in the width direction is
By forming the rear recess 18A, the mounting point of the bracket 20 is offset more rearward than the suspension member 12, and thereby the attachment point of the bracket 20 to the suspension member 12 and the cross member 1 are
By increasing the distance between the attachment points to the suspension member 8, the support rigidity of the suspension member 12 against loads in the longitudinal direction is increased. Further, since the cross member 18 does not bend itself, there is no decrease in rigidity, and since the suspension member 12 is straight, there is no decrease in rigidity, and there is no need to shorten the suspension arm. . In particular, in this embodiment, as shown in FIG. 2, the bracket 20 has a substantially triangular shape when viewed from the side, and has three points: the upper surface and front lower part of the suspension member 12, and the lower surface of the cross member 18. Since it is connected to these, not only does the bracket 20 itself have a high cross-sectional rigidity, but also the three-point support greatly increases the rigidity with which the bracket 20 engages the suspension member 12 with the cross member 18. Furthermore, in the above embodiment, the rear recess 18A is formed in the cross member 18 as described above, and the rear surface of the cross member 18 is curved forward than the suspension member 12, so that the luggage room 26 is The underfloor storage section 27 is inserted into the rear recessed section 18A.
The capacity of the underfloor storage section 27 can be expanded by extending it forward in comparison with the conventional case. Further, the bracket 20 is connected to the underfloor storage section 2.
Since it is curved along the front end corner 27B of the underfloor storage section 27, it is possible to maximize the protrusion of the underfloor storage section 27 toward the front of the vehicle body. Furthermore, as shown by the two-dot chain line in FIG. 2, when the fuel tank 30 is disposed below the rear seat 32, one end of the tank band 34 for suspending the fuel tank 30 is conventionally , it was connected to a bracket attached to the lower side of the floor panel, but in the case of the above example,
One end of the tank band 34 can be directly fixed to the cross member 18, which is attached to the front of the vehicle body compared to the prior art. Although the above embodiment relates to a support structure for a rear suspension of an automobile, the present invention is not limited thereto, and can of course be applied to a front suspension.

[Effect of the idea]

Since the present invention is constructed as described above, it is possible to significantly increase the support rigidity of the suspension member in the longitudinal direction of the vehicle body and stably support the suspension member, thereby increasing the handling stability of the automobile. It has the excellent effect of being able to

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the automobile suspension support structure according to the present invention, Fig. 2 is a schematic cross-sectional view showing the same embodiment, and Fig. 3 is the same embodiment with the floor panel removed. FIG. 4 is a cross-sectional view taken along the - line in FIG. 3, FIG. 5 is a perspective view showing a conventional McPherson strut type rear suspension, and FIG. 6 is a schematic cross-sectional view of the same. It is a diagram. 12... Suspension member, 14... Suspension arm, 16... Shaft, 18... Cross member, 18A... Rear recess, 20... Bracket, 22... Side member, 26... Luggage room, 27...Underfloor storage section, 27A...Bottom surface,
27B...front end corner, 28...floor panel.

Claims (1)

[Claims for Utility Model Registration] (1) A suspension member that is attached to the lower part of the vehicle body and is long in the width direction of the vehicle body, and the tip of the suspension arm that extends toward the center of the suspension in the width direction of the vehicle body is connected to the suspension member. In an automobile suspension support structure in which a member is swingably supported via an axis extending in the longitudinal direction of the vehicle body, the suspension member is linear, and the suspension member is supported longitudinally in the longitudinal direction of the vehicle body with respect to a cross member of the vehicle body. The cross member is connected to the vehicle body at both ends in the vehicle width direction at a position that at least partially overlaps in the vehicle body direction, and the cross member has a concave side surface on the suspension arm side, and a center in the longitudinal direction of the vehicle body is connected to the vehicle body at both ends in the vehicle body width direction. An automobile characterized in that the suspension member is arranged offset in a direction opposite to the suspension arm from the longitudinal center of the vehicle body, and a substantially central portion of the suspension member in the vehicle body width direction is connected to the cross member by a bracket. suspension support structure. (2) the cross member is arranged upwardly offset from the suspension member;
The automobile according to claim 1, wherein the bracket connects the cross member side surface, lower surface, and upper surface of the suspension member to the lower surface of the cross member. Suspension support structure. (3) The suspension is a rear suspension, and at the rear of the cross member, an underfloor storage section of the luggage room protrudes below the floor panel along the rear recess of the cross member. , the suspension member is disposed in the vehicle width direction passing through the front lower side of the bottom surface of the underfloor storage section, and is fixed to the lower sides of the left and right side members at both ends in the vehicle body width direction, and the bracket is 2. The suspension support structure for an automobile according to claim 1, wherein the suspension support structure is arranged in a curved manner along a front end corner of the underfloor storage section.