JPH072255Y2 - Car suspension equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a suspension device for an automobile, and more particularly to a rear suspension having an improved stabilizer.

(Prior Art) A rear suspension for mounting the left and right rear wheels to the vehicle body is usually assembled with the rear cross member which is fixed to the vehicle body at both ends and is provided along the vehicle width direction of the vehicle body. Two knuckles or hubs for wheel support and a plurality of lateral links for connecting these knuckles to the rear cross member. Each of the knuckles is connected to the vehicle body through a strut in a state in which a spring force is applied to the knuckle. The weight of the vehicle body is received by the struts, and the lateral links swing when the wheels move up and down. It will be. Also, in order to restore the knuckles and wheels to the normal state under the load applied during cornering and rolling of the vehicle body, a stabilizer is joined directly between the two knuckles or via a tension rod, that is, a trailing arm or strut. ing.

In the rear cross member described above, the weight of the vehicle body is usually received by the knuckle through the strut, so the weight of the vehicle body does not add much, but when jacking up the vehicle body, The portion of the rear cross member receives the weight of the vehicle body. Therefore, it is necessary to set the rear cross member to a strength capable of receiving the weight of the vehicle body in consideration of jacking up of the vehicle body.

By the way, the structure of the suspension tends to increase and the structure tends to become complicated in order to improve the strength and riding comfort of the suspension accompanying the recent high performance of automobiles. In order to secure the suspension, a suspension device as disclosed in Japanese Utility Model Laid-Open No. 63-88516 has been developed.

(Problems to be solved by the invention) However, in the device disclosed in this publication, a recess is formed in the lower side of a closing member attached to the lower part of a cross member, and a stabilizer is passed through the recess, and This is to ensure space, and not only the cross-sectional shape of the closing member becomes complicated, but also the vertical width of the cross member integrated with it including the closing member can be set sufficiently large. It will not be possible. The vertical cross-sectional modulus of the cross member largely depends on this vertical width. Increasing the width in this direction increases the cross-sectional modulus in this direction. The strength in this direction can be increased.

Therefore, in the present invention, the space for arranging the stabilizer is sufficiently secured, and the strength of the cross member is increased to increase the weight of the body body added to the cross member when jacking up the body body. Also aims to be able to withstand.

(Means for Solving the Problem) The present invention for achieving the above-mentioned object is to provide a rear cross member that is attached to the vehicle body along the vehicle width direction and has an opening at the bottom, and the rear cross member center in the vehicle width direction. In a suspension device for an automobile having a closing member attached so as to close the lower surface of the part, and a lateral link connecting the rear cross member and a knuckle for supporting a wheel, the rear cross member includes a base part and a base part of the rear cross member. A base part which is composed of a connecting end part that is inclined from both ends and has an inverted U-shaped cross-section so that the lower part is opened over substantially the entire length, and the closing member is joined to the base part of the rear cross member. And a flange portion provided at both ends of the base portion and formed in a U-shaped cross section. A flange portion of the closing member is configured to have a predetermined space between the flange portion and outer surfaces of front and rear wall portions of the rear cross member, and the lateral link is formed between the flange portion and the front and rear wall portions of the rear cross member. Is a suspension device for an automobile in which one end of is connected.

The rear cross member and the closing member, in which the two bases are joined to form a space, pass through a stabilizer whose both ends are connected to the knuckle or strut in the space. .

(Operation) In the present invention thus constructed, the closing member having a U-shaped cross section is attached to the lower central surface of the rear cross member, and the flange portion of the closing member is arranged at a predetermined distance from the outer surface of the front and rear wall portions of the rear cross member. However, since the lateral links are connected using this interval, the section modulus determined by the section formed by the rear cross member and the closing member can be set large, and a large load such as when jacking up can be applied to the rear cross member. Even if it acts on the part of the rear cross member, the strength of the rear cross member can be sufficiently secured, and since a wide closing member can be used for jacking up, etc., the operation is easy, and the lateral link is also the flange of the closing member. Since it can be installed using the part,
The peripheral structure of the rear cross member can be simplified, and the rigidity of the cross member can be further improved by utilizing the base portion or the flange portion of the closing member.

Moreover, only a rear cross member having a curved shape having a connecting end portion that is inclined and rising from the base portion and having an inverted U-shaped cross section and an opening at the lower side, and only the central portion in the longitudinal direction of this rear cross member. When penetrating the stabilizer in the space formed by the closing member attached so as to be closed, even if the arms at both ends are long stabilizers, they can be easily installed in the rear cross member, The workability of installing the stabilizer will be improved. Also, since this stabilizer is not located outside or below the rear cross member but inside the rear cross member, the presence of the stabilizer does not impair the minimum ground height of the vehicle body, and the suspension area is simplified, A sufficient space can be secured around the rear cross member, and the vertical cross-sectional shape of the rear cross member can be set sufficiently large.

Further, since the stabilizer is housed inside the rear cross member, the vertical cross-sectional shape of the rear cross member can be set sufficiently large regardless of the presence of the stabilizer.

(Embodiment) Next, the present invention will be described in detail with reference to the illustrated embodiment of the present invention.

FIG. 1 is a view showing a suspension device for an automobile according to an embodiment of the present invention, which has a base portion 10a and connecting end portions 10b which are inclined and rise from both ends thereof, as shown in FIG. The rear cross member 10, which is substantially U-shaped when viewed from the front, is attached to the vehicle body B shown in phantom in FIG.
The rear cross member 10 is fixed at the connection end portion 10b, and the rear cross member 10 is fixed in a direction along the vehicle width direction of the vehicle body B. The rear cross member 10, which is also called a sub-frame or suspension member, has an inverted U-shaped cross section with an opening at the bottom as shown in FIGS. 1 and 4.

As shown in FIG. 4, the closing member 11 has a base 11a.
And two flange portions 11b and 11c rising from both end portions of the flange portion 11c upward, and are formed in a substantially U-shaped cross section as shown in the figure. This closing member 11
The base 11a of the rear cross member 1
Flange portion 10 formed around the entire lower surface of the base portion 10a of 0
It is joined to c. This joining is performed by joining means such as spot welding. Further, in this embodiment, a long hole 10c extending in the vehicle width direction is provided on the upper surface of the cross member facing the joined closing member, and a notch 11d is provided near the space end of the closing member, and the stabilizer 21 is provided in the space. This long hole 10
By using c or the notch 11d, the stabilizer 21 can be easily attached. The distance between the flange portions 11b and 11c of the closing member 11 is larger than that between the front and rear wall portions W _f and W _r of the base portion 10a of the rear suspension 10 as shown in FIG. The flange portions 11b and 11c are provided so as to face each other with predetermined spacings S _f and S _r between them and the outer surfaces of the front and rear wall portions W _f and W _r . Further, one flange portion, that is, the body B
The rear flange portion 11b is set to have a shorter length in the vehicle width direction than the other flange portion 11c, as shown in FIGS.

One of the two rear wheels W is shown in phantom in FIG. 1, and the knuckle or hub 12 (see FIGS. 2 and 3) for supporting the respective wheels W has four lateral links 13. Is connected to the rear cross member 10. Each of the lateral links 13 is composed of a main body 13a having a U-shaped or cylindrical cross section, and tubular portions 13b and 13c joined to both ends of the main body 13a.

Attach each lateral link 13 to its one end
In order to connect to the rear cross member 10 at the part of b,
As shown in FIG. 4, bolts 14 are fastened between the front and rear wall portions W _f and W _r of the rear cross member 10 and the flange portions 11 b and 11 c of the closing member 11, and the respective bolts 14 have a sleeve 15 and a sleeve 15 thereof. The tubular portion 13b is fitted via the outer rubber cushion 16. Similarly, each of the lateral links 13 is also fastened to the knuckle 12 at the other end of the tubular portion 13c with a bolt.

Further, a strut 17 is attached to the knuckle 12 and the vehicle body B, and a considerable weight of the vehicle body B is supported and transmitted to the wheels W via the strut 17. Also, for each knuckle 12,
A trailing arm that is oriented almost in the front-back direction of the body B
One end of the trailing arm 18 is attached, and the other end of the trailing arm 18 is connected to the vehicle body B. The trailing arm 18 regulates the movement of the knuckle 12 in the front-rear direction.

As shown in FIG. 4, the lower surface of the above-mentioned closing member 11 is a projection portion 19 which is partially bulged downward. The protrusion 19 is used for installing the jack when jacking up the vehicle body B when the wheel is replaced, and a hole O for draining water is formed in this portion.

As described above, the four lateral links 13 are connected to the rear cross member 10 by the four bolts 14, but the bolt 14 located on the rear side of the vehicle, that is, the flange portion 11b and the rear cross member 10 are connected to each other. The distance between the two bolts fastened to the
That is, the distance between the two bolts fastened to the flange portion 11c and the rear cross member 10 is narrower, and each bolt 14 has a substantially U-shaped cross section as shown in FIG. The space 20 formed inside the rear cross member 10 has not penetrated in the front-back direction of the vehicle body B, that is, in the vehicle traveling direction. Therefore, a sufficiently wide space is secured in this space 20.

While allowing vertical movement of the two rear wheels W, that is, the knuckle 12 with respect to the rear cross member 10, when the vertical positions of the left and right rear wheels are deviated during rolling or cornering of the vehicle body, the postures of the two knuckles 12 are changed. The knuckles 12 are connected to each other by a stabilizer 21 in order to maintain a predetermined state. This stabilizer 21 includes a central portion 21a along the vehicle width direction and both end portions inclined forward and upward of the vehicle as shown in FIG.
21b, and the central portion 21a penetrates the space 20 in the vehicle width direction. Both ends of this central portion 21a are bearings for the receiving metal fittings 22 joined to the rear cross member 10.
It is rotatably attached via 23, and the central portion 21a is rotated with the vertical movement of both end portions 21b.
If 1b moves up and down in the opposite direction, it will be twisted.

As described above, since the bolt 14 is prevented from penetrating into the space 20, the stabilizer 21 can be penetrated to any position in the space 20 in the vehicle width direction, and the stabilizer 21 can be inserted into the rear cross member 10. It is no longer necessary to position it outside the car, and it is possible to secure sufficient space around the suspension. Further, since the stabilizer 21 is made to penetrate into the space 20, the section coefficient determined by the section formed by the rear cross member 10 and the closing member 11 integrated with the rear cross member 10, and thus the section having a corresponding relationship therewith. Rear cross member 10 that can set a large second moment and hits the jack when the vehicle is jacked up
It has become possible to sufficiently increase the strength of. However, 2
It is also possible to use the bolts 14 of the book to penetrate them into the space 20 so as to connect the lateral link 13 to the rear cross member 10, and in that case, these bolts 14 and the stabilizer 21 It is necessary to avoid interference.

It should be noted that the suspension device shown is an example of the present invention, and there are various types of this suspension device. In some cases, links called lower links and upper links are connected as links having the same function without being connected, and in that case, the lower links and the upper links form a lateral link.
That is, the lateral link includes all links connecting the rear cross member 10 and the knuckle 12.
Further, the stabilizer 21 is a member that sets the two knuckles 12, and thus the two wheels W, in a predetermined positional relationship with each other, even if both ends thereof are directly connected to the knuckle 12, or the trailing arm 18 or Any of them may be indirectly connected via a lower link or a strut.

(Effect of the Invention) As described above, according to the present invention, the closing member having a U-shaped cross section is attached to the lower surface of the center of the rear cross member,
Moreover, the flange portion of the closing member is arranged at a predetermined distance from the outer surfaces of the front and rear wall portions of the rear cross member,
Since the lateral links are connected using this interval, the section modulus determined by the section formed by the rear cross member and the closing member can be set to a large value, and even when lifting the vehicle body at the rear cross member, The strength of the cross member can be sufficiently secured, and a wide closing member can be used, so the operation is easy and the lateral link can be attached using the flange part of the closing member. The peripheral structure can be simplified, and the rigidity of the cross member can be further improved by utilizing the base portion or the flange portion of the closing member.

Moreover, only a rear cross member having a curved shape having a connecting end portion that is inclined and rising from the base portion and having an inverted U-shaped cross section and an opening at the lower side, and only the central portion in the longitudinal direction of this rear cross member. When the stabilizer penetrates into the space formed by the closing member attached so as to be closed, the length of the closing member in the vehicle width direction is the minimum required central portion in the longitudinal direction including the left and right lateral link attachment portions. Since the length is only the chisel, even if the arms at both ends are long stabilizers, they can be easily installed in the rear cross member, and the workability of attaching the stabilizers is improved.

Also, since this stabilizer is not located outside or below the rear cross member but inside the rear cross member, the presence of the stabilizer does not impair the minimum ground height of the vehicle body, and the suspension area is simplified, A sufficient space can be secured around the rear cross member, and the vertical cross-sectional shape of the rear cross member can be set sufficiently large.

Further, since the stabilizer is housed inside the rear cross member, the vertical cross-sectional shape of the rear cross member can be set sufficiently large regardless of the presence of the stabilizer.

[Brief description of drawings]

FIG. 1 is a perspective view showing an automobile suspension device according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a front view of the vehicle body rear view of FIG. 1, and FIG. The drawing is a sectional view taken along the line IV-IV in FIG. 10 …… Rear cross member, 11 …… Closing member, 11b, 11c …… Flange part, 12 …… Knuckle, 13 ……
Lateral link, 20 …… space, 21 …… stabilizer,
10a …… Rear cross member base, 10b …… Connecting end, 11a …… Closing member base, 11b, 11c …… Flange, W _f , W _r … Front and rear walls.

Claims (2)

[Scope of utility model registration request] 1. A rear cross member which is attached to a vehicle body along the vehicle width direction and which is opened at the lower side, a closing member which is attached so as to close a lower surface of a central portion of the rear cross member in the vehicle width direction, and a rear. In a vehicle suspension device having a lateral link connecting a cross member and a knuckle for supporting a wheel, the rear cross member is composed of a base portion and a connection end portion that is inclined and rises from both ends of the base portion. Cross section U so that the bottom is opened over almost the entire length
The closing member is formed in a U-shape, and the closing member includes a base portion joined to the base portion of the rear cross member, and flange portions provided at both ends of the base portion, and has a U-shaped cross section. The flange portion of the rear cross member and the outer surface of the front and rear wall portions of the rear cross member with a predetermined distance, and connects one end of the lateral link between the flange portion and the front and rear wall portions of the rear cross member. Suspension device for automobiles. 2. The rear cross member and the closing member, in which both bases are joined to form a space, pass through a stabilizer having both ends connected to the knuckle or strut in the space. Item 3. A vehicle suspension device according to item 1.