JPS6345964B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suspension mounting device used in vehicles such as automobiles for elastically attaching a suspension member with wheels attached to the vehicle body, and particularly relates to a suspension mounting device that is used in vehicles such as automobiles, and particularly relates to a suspension mounting device for elastically attaching a suspension member to a vehicle body. This invention relates to a suspension mounting device for a vehicle that aims to improve the overall performance of a vehicle.

In vehicles such as automobiles, if the wheel axles are fixed directly to the vehicle body, vibrations caused by uneven road surfaces will be transmitted directly to the entire vehicle, giving a large impact to various parts of the vehicle and making the ride uncomfortable. is elastically attached to the vehicle body via a suspension mounting device equipped with an elastic insulator to reduce shocks received from the road surface.

2. Description of the Related Art Conventional vehicle suspension mounting devices include those shown in FIGS. 1 to 4, for example. Reference numeral 1 indicates a double wishbone type front suspension device, and reference numeral 2 indicates a suspension member of this suspension device 1. The suspension member 2 extends in the vehicle width direction (AA), and axles 3 and 4 for left and right wheels are attached to both ends thereof so as to be vertically rotatable and steerable. Reference numeral 5 designates a side member serving as a vehicle body, and this side member 5 extends from both sides of the vehicle body (in FIG. 1, only one side member is shown for convenience of illustration) in the vehicle body longitudinal direction (B-B) to form a suspension member. 2
It is located above. Reference numeral 6 indicates a conventional suspension mounting device, in which the suspension member 2 is elastically attached to the side member 5. This conventional suspension mounting device 6 has a configuration particularly shown in FIGS. 2 to 4 in detail. Reference numeral 14 is a collar having a cylindrical shape with a flange portion, and is fitted into the suspension member 2 from the right side in FIG. 2 and welded to the suspension member 2. A hollow portion of the collar 14 forms a mounting hole 7 which is a recessed portion extending in the vehicle body vertical direction (CC). A stud bolt 8, which is a convex portion, is protruded from the side member 5 and is loosely inserted into the mounting hole 7. A metal block 10 is fastened to the stud bolt 8 with a nut 11 and loosely inserted into the mounting hole 7. A bound stopper 12 that can come into contact with the upper surface of the suspension member 2 is clamped between the block 10 and the side member 5.
A rebound stopper 13 that can come into contact with the lower surface of the suspension member 2 is clamped between the suspension member 2 and the suspension member 2. The engagement plate 16 inserted left inside the collar 14 and the block 10 are connected by a solid elastic insulator 15 interposed within the mounting hole 7 in the vehicle width direction (AA). The elastic insulator 15 has a laminated structure of two layers of elastic bodies sandwiched between the block 10 and the engagement plate 16 via the intermediate plate 17. Also elastic insulator 15
The thickness in the vehicle width direction (A-A) in the vertical direction of the vehicle body is almost uniform. Vehicle body longitudinal direction of block 10 (B
-B) is attached with an elastic stopper 18 that can come into contact with the collar 14 and has a gap between it and the collar 14.

By the way, suspension mounting devices are originally required to have the following characteristics for vibration isolation and steering stability. In other words, (a) vehicle body vertical direction (C) caused by road surface vibration, engine vibration, etc.
-C) It has a small elastic modulus and absorbs vibrations well in response to minute inputs. (b) It has a small elastic modulus and absorbs vibrations well against input in the longitudinal direction (B-B) of the vehicle body due to road vibrations such as ride harshness. (c) In response to large inputs in the vehicle width direction (A-A) due to vehicle turns, etc., the elastic modulus is large, resulting in small elastic deformation and small compliance steer.

However, in the conventional suspension mounting device 6 as described above, the above-mentioned requirements cannot be met.
The elastic insulator 15 related to (a), (b), and (c) connects the suspension member 2 and the side member 5 with a uniform thickness in the vehicle width direction (A-A) in the vertical direction of the vehicle body. For example, if the elastic modulus of the elastic insulator 15 is made smaller to satisfy requirements (a) and (b), there will be a problem with requirement (c).
Conversely, to satisfy requirement (c), elastic insulator 1
It was extremely difficult to satisfy all requirements (a), (b), and (c), as increasing the elastic modulus of No. 5 would cause problems with requirements (a) and (b).

This invention was made by focusing on these conventional problems, and satisfies all of the above requirements by making the thickness of the elastic insulator in the vehicle width direction at the center in the vertical direction of the vehicle body smaller than at both ends. The purpose is to satisfy.

The present invention will be explained below based on the drawings.

5 to 8 are diagrams showing an embodiment of the present invention. First, the configuration will be explained. Reference numeral 21 indicates a suspension mounting device of this embodiment. 2
2 is a suspension member of a double-width bone type front suspension, which is formed by inserting a cylindrical collar 30 with a flange from the right side in Fig. 5 and welding it to the suspension member 22. Direction (CC)
A mounting hole 23, which is a concave portion extending to the bottom, is provided, and a wheel (not shown) is mounted thereon. Reference numeral 24 designates a side member of the vehicle body extending in the longitudinal direction (BB) of the vehicle body, and a stud bolt 25, which is a convex portion that is loosely inserted into the mounting hole 23, is provided in a protruding manner. A metal block 26 is fastened to this stud bolt 25 with a nut 27, and the mounting hole 23
It is loosely inserted inside. There is a suspension member 22 between the block 26 and the side member 24.
A bound stopper 28 that can come into contact with the upper surface is clamped, and a rebound stopper 29 that can come into contact with the lower surface of the suspension member 22 is clamped between the block 26 and the nut 27. The engagement plate 33 inserted into the inner surface of the collar 30 and the block 26 are aligned in the vehicle width direction (A-
A) Solid elastic insulator 32 interposed in
are connected by. Further, a stopper 31 is provided at the end of the block 26 in the longitudinal direction (BB) of the vehicle body. The elastic insulator 32 has a laminated structure of two layers of elastic bodies sandwiched between the block 26 and the engagement plate 33 by an intermediate plate 34.
Both end surfaces of the elastic insulator 32 in the vehicle width direction are connected to an engagement plate 33, an intermediate plate 34, and a block 2.
6 is completely glued. The intermediate plate 34 located between the elastic insulators 32 has a bulging portion 35 extending in the vehicle width direction (A-A) at the center in the vertical direction of the vehicle body.
is formed, and the thickness of the intermediate plate 34 in the vehicle width direction (A-A) at the center in the vehicle body vertical direction is greater than at both ends. Therefore, as particularly shown in FIG. 8, between the intermediate plate 34 and the engagement plate 33,
Alternatively, the thickness (t _A ) of the elastic insulator 32 sandwiched between the intermediate plate 34 and the block 26 in the vehicle width direction (A-A) at the central portion in the vertical direction of the vehicle body is equal to It is smaller than the thickness (t _B ) of A-A).

Next, the action will be explained.

In the suspension mounting device 21 having the above-described configuration, an input in the vehicle width direction (A-A) is applied to the elastic insulator 3 due to turning of the vehicle or the like.
2, the elastic insulator 32 is compressed or stretched in the vehicle width direction (A-A), but the thickness (t _A ) in the vehicle width direction is small at the center of the elastic insulator 32, and instead Since the thickness of the metallic intermediate plate is large, the rigidity of the elastic insulator 32 in the vehicle width direction (AA) is large and its elastic deformation is small. Therefore, suspension member 2
2 and side member 24 in the vehicle width direction (A-A)
The relative movement of can be reduced, and as a result,
It is possible to improve the steering stability of the vehicle by reducing compliance steer when the vehicle turns.

On the other hand, in the suspension mounting device 21 described above, the elastic insulator 32 is mounted on the vehicle body in the longitudinal direction (B-B) by the road surface or the engine.
Alternatively, when vibration input is applied in the vehicle body vertical direction (CC), the elastic insulator 32 is sheared and deformed, but its elastic modulus is smaller than the compressive or tensile elastic modulus, and the vehicle body longitudinal direction (B-B ) and the vehicle body vertical direction (C-C), and the vehicle body longitudinal direction (B-B) and the vehicle body vertical direction (C-
C) Both ends 32A of the elastic insulator ₃₂ (eighth
(as shown in the figure), it is possible to prevent vibrations from being transmitted to the vehicle body and prevent a decline in vibration damping performance.

FIG. 9 is a diagram showing another embodiment of the invention. Note that the same parts as in the above-mentioned embodiment are given the same numbers, and the description thereof will be omitted. In this embodiment, the intermediate plate 34 is not provided with a bulge, but instead, the block 26 and the engagement plate 33 have a bulge 36 extending in the vehicle width direction (A-A) at the center in the vertical direction of the vehicle body. , 37 are provided respectively, and the elastic insulator 32 is located in the vehicle width direction (A-
The thickness of A) is made smaller than the thickness of both ends in the vehicle width direction. The operation of the suspension mounting device according to this embodiment is the same as that of the suspension mounting device of the previous embodiment, so a description thereof will be omitted.

In this embodiment, the mounting holes are provided in the suspension member 22, but they may also be provided in the side members 24.

Further, although the above-mentioned two embodiments have both been described with respect to a double wishbone type front suspension, it is clear that the present invention can be applied to other types of suspensions and rear-side suspensions.

As explained above, according to this invention,
A pair of solid elastic insulators that connect the vehicle body and the suspension member are made so that the thickness in the vehicle width direction at the center in the vertical direction of the vehicle body is smaller than the thickness at both ends. Because the entire surface of the surface is fixed to the vehicle body and suspension member, it is possible to reduce compliance steer in response to input in the vehicle width direction without reducing the vibration isolation performance of vehicle longitudinal and vertical vibrations. The steering stability of the vehicle can be improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional vehicle suspension mounting device, Fig. 2 is a plan view of the portion shown in Fig. 1 showing a conventional suspension mounting device, and Fig. 3 is a conventional suspension mounting device. A cross-sectional view taken along the line -- in FIG. 2 showing the device,
FIG. 4 is a sectional view taken along the line -- in FIG. 2 showing a conventional suspension mounting device, and FIG. 5 is a plan view corresponding to FIG. 2 showing a vehicle suspension mounting device according to an embodiment of the present invention. , FIG. 6 is a sectional view taken along the line - - of FIG. 5 showing this embodiment, FIG. 7 is a sectional view taken along the line - - of FIG. 5 showing this embodiment, and FIG. 8 is a sectional view taken along the - line of FIG. The enlarged sectional view, FIG. 9, is a sectional view corresponding to FIG. 7, showing a vehicle suspension mounting device according to another embodiment of the present invention. 21...Suspension mounting device, 2
2...Suspension member, 23...Mounting hole (recess), 24...Side member (vehicle body), 25...Stud bolt (protrusion), 26...Block, 27...Nut, 28...Bound stopper, 29...Rebound stopper , 30...color, 31...stopper, 3
2...Elastic insulator, 34...Intermediate plate, 3
5, 36, 37... Expansion section.

Claims (1)

[Scope of Claims] 1. Either one of the vehicle body and the suspension member is provided with a convex portion extending in the vertical direction of the vehicle body, and the other is provided with a concave portion that loosely fits into the convex portion,
A vehicle suspension mounting device comprising a pair of solid elastic insulators interposed in the vehicle width direction between the concave portion and the convex portion and connecting the vehicle body and the suspension member. The thickness of the elastic insulator in the vehicle width direction at the center part in the vehicle body vertical direction is made smaller than the thickness in the vehicle width direction at both end parts in the vehicle body vertical direction, and the entire surface of both end surfaces of the elastic insulator in the vehicle width direction is covered with the vehicle body. A suspension mounting device for a vehicle, which is fixed to a suspension member. 2. The elastic insulator includes an intermediate plate having a thickness in the vehicle width direction at both ends in the vertical direction of the vehicle body that is smaller than a thickness in the vehicle width direction at a central portion in the vehicle body direction. Suspension mounting device for the vehicle described.