JPS5876316A - Rear suspension - Google Patents

Abstract

PURPOSE:To obtain a stable driving capacity by connecting a rear transverse link with an assist link for preventing the toe-out of a wheel even if the point of action of a side force is slided backward at the time of turning. CONSTITUTION:A rear wheel 1 is supported by a spindle 13, which is attached to a car body by front and rear transverse links 3, 5, a radius rod 25, and a strut 27. At this stage, an assist link 21 is connected with the rear link 5. Car-body fixing bushes 9, 11, and 23 for these links are equalized in their rigidity. In this construction, even if the point of action of a side force F is slided to a backside (t), a force given to the rear link 5 is shared by the assist link 21, and the wheel 1 is prevented from toe-out. As each bush is equalized in its rigidity, it is given the same resonance point, and prevented from lowering of the capacity of sound vibration.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to &jL of a rear suspension.

Examples of conventional liana pensions include those shown in FIGS. 1 and 2. This rear suspension is provided between the vehicle body (not shown) and the wheels 101,
It consists of two front and rear transverse links 108, 105, a radius thread 125, and a suspension strut 127.

The transverse links 108, 105 are arranged in parallel in the front and rear of the vehicle body in the traffic direction, sandwiching the wheel axle center, and are attached to the vehicle body through pushers &109, 111. At the interface between the front transverse link 10s and the rear transverse link 105, there is an outer jl (lower m1l in Fig. 2).
In l), spindo #11JI is y&:In-t
15, 117f: attached via. and,
The wheel 101 is supported at the center of the spindle 1s in the longitudinal direction.

By the way, when the automobile turns in the direction of the arrow M in FIG. The restoring force of this modified wheel, that is, the force F, is adjusted in the lateral direction (
Upper direction in Figure 2) K works. This side force F@ is
If the point of action is on the axis of the wheel 1010, there will be no problem, but as shown in FIG. 8), the point of action is generally shifted rearward from the axis by 80 minutes of the pneumatic trail.

Therefore, the front transverse link 108 and the rear transverse link 1 share this side 7 aus F.
Different forces are applied in the vehicle width direction via the spindle 1lilk depending on the thread of the point of application. Specifically, the force acting on the front transverse link 108 is small and the force acting on the rear transverse link 105 becomes large. Then, the front bushing 109 and the rear bushing 111, which are formed to have the same rigidity in the vehicle width direction (hereinafter referred to as lateral rigidity), have different amounts of deformation due to the difference in the applied force, and the rear bushings have a different amount of deformation than the front bushings. From the dashed line in Figure 8 to the solid line in Figure 8, 11C is greatly deformed in the lateral direction to form the backup silan sparse link 105.
Therefore, the wheel 101 becomes toe-out by θ, ·, which increases the tendency of oversteer. This is an extremely dangerous situation in which the vehicle body spins during a turning motion such as 5.
t- It becomes easier to invite.

Therefore, the following five methods can be considered as means to reduce the tendency of oversteer during turning motion or to slightly understeer, and to improve the above-mentioned problems.

First, IMxwc, the horizontally rigid front book 3-109 of the book $111 on the rear side, and the rear pushshie with a higher grip: 'A greater force due to the nide 7 os than the pushshie on the IIIKII side $109. Even if it works, the front side is stiff!
5 so that the amount of deformation of the bushing 109 and the bushing 111 on the rear side can be made almost the same.Secondly, the lateral rigidity of the bushings 109 and 111 on the front and rear sides are made the same. The support point for the spindle 118 of the single wheel 101 is shifted forward from the front-rear intermediate position, and the forces acting on the front transverse link 108 and the rear transverse link 1G5 are made almost the same, and the front and rear bushes 1 (1,
The amount of deformation of 111 can be made almost the same. However, in the first method, the front and rear bushes 10), 111F) have the same mass [if the stiffness is different, then the front side.

There are two resonance points due to the rear bushings 109 and 111, and it is extremely easy to resonate when vibration occurs, and the rear bushing 111, which has increased rigidity, can easily transmit vibrations due to its increased rigidity. This is extremely disadvantageous in terms of performance. @
In the second method, the degree of freedom in design is limited in order to prevent the single wheel 101 from interfering with the wheel link.

This invention was devised in view of the above-mentioned problems, and it is possible to prevent the wheels from toe-out even if the point of action of the nid force shifts to the rear by 1 = 5--y tick trail when turning. To provide a rear suspension ventilation system that prevents the snow and allows stable 2l/2g feed to be obtained.

In order to achieve this object, the present invention provides a bushing that is installed between a vehicle body and a wheel support member that supports a wheel, and is provided at the front and rear of the vehicle with the wheel axis sandwiched between the vehicle body and the wheel support member. A front transverse link and a rear transverse link that support
l A rear suspension comprising a radius link for rearward positioning, and a suspension foot that is disposed downward on the road and whose lower part is connected to both of the two force links and whose upper part is connected to the vehicle body, An assist link is provided, one end of which is connected to the vehicle body via a bushing, and the other end of which is connected to the rear of the wheel axis of the wheel support member or to a rear transverse link, so that at least each bushing provided on the vehicle body has the same rigidity. This is what I did.

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings.

As shown in FIGS. 4 and 5, at 5, there is a spindle 18, which is a wheel support member that rotatably supports the vehicle body (not shown) and the wheel 1, at the front side of the vehicle body (not shown) and the spindle 18, which is a wheel support member that rotatably supports the wheel axis. A transverse link 8 and a rear transverse link 5 are provided to support the wheels 1 on the vehicle body. Specifically, ring brackets 7 are protruded from both left and right sides of the rear part of the vehicle body (however, only the left side is shown in Figure 1g4).

Front and rear of this link bracket 7 (front and back in the direction of regression of the vehicle body)
, the inner end of the front transverse link 8 is attached to the front bushing 9, and the inner end of the backup transverse link 5 is attached via the rear bushing V5-11. The front transverse link 8 is mounted so as to be substantially orthogonal to the traveling direction, and the rear transverse link 5 has an outer end (lower end in Fig. 5) slightly rearward than an inner end. It is installed so that

A spindle 18 is attached between the outer end of the front transverse link 8 and the outer end of the rear transverse link 5 via the front pusher 5-15 and rear bushing 17. .

An axle 19 is horizontally applied laterally outward to the spindle 1B at the front and rear intermediate portion thereof, and this axle 19K and the axle 1 are rotatably supported.

11g between the vehicle body and the rear transverse link side.
An assist link 21 is provided in connection with the 1lffi wheel l. This assist link 21 has its outer end at the rear pusher 3 at the outer end of the Lancer link 5.
It is attached to the spindle 18 rearward from the axis of the wheel 190 through the assist bush 28, and its inner end is attached via an assist bush 28 to an assist link bracket (not shown) attached to the vehicle body. And assist link 2
1 is attached to 5 so that the inner end is closer to the rear than the outer end. Therefore, assist link 21
It is configured to share the lateral force acting on the iL111D tunnel sparse link 75. The position of the rear transverse link 5 and the assist link 21 on the vehicle body is determined according to the force to be shared by the assist link 21 and at a position 5 so as not to generate a force in the longitudinal direction of the vehicle body.

Further, the front bushing 9, the rear bushing 5-11, and the thrust bushing 28 have the same spring constant and are molded to have the same mass.

In addition, 2s in the figure is a radius thread, which is provided in the longitudinal direction between the two totsu/sparse links 8, 5 and the vehicle body to position the wheel 1 in the longitudinal direction. In other words, the Fujia rod 25 may be installed between the vehicle body and the axle 19. Reference numeral 27 denotes a suspension strut, which is provided vertically between the outer ends of the two suspension links 8, 5 and the vehicle body to support the static load of the vehicle body and absorb vertical vibrations of the wheels. It is.

Next, the operation of the above embodiment will be described.

When the vehicle body (not shown) is turning, the rear wheel 1, which rolls while sliding sideways in the turning direction, deforms in the rolling direction, and a side force is generated as a restoring force to counter the centrifugal force. F acts in the lateral direction (and the point of application of this side force y is shifted rearward from the axis of the wheel l by the amount of the neutral force y as shown in Fig. 6). Therefore, , in response to the deviation of this point of action, a lateral force is applied to the rear bushing 17 of the spindle 18 via the single shaft 19, which is greater than the lateral force acting on the front book 5-15 of the spindle 1m. The force acting on the m*)9 transverse link 8 acts on the rear transverse link 8, and the force acting on the rear bushing 17 is shared between the rear transverse link 5 and the assist link 21. Therefore, the amount of deformation of the rear bushing 11 and the assist bush 28 due to the force acting on the rear transverse link 5 and the assist link 21 becomes small. At this time, the spindle 1s
is displaced in the lateral direction in an almost parallel movement state from the broken line shown in the ms diagram to the solid line shown in the ms diagram. Therefore, the single wheel 1 also moves in parallel only by 8 via the axle 19, and does not tilt during toe-out.

Therefore, when the vehicle body turns, it becomes stable without causing oversteer or increasing its tendency.

As described above, the present invention provides a bushing that is attached to the connection between a vehicle body and a wheel support member that supports a wheel, and is also provided at the front and rear with the wheel axis sandwiched between the bushes to support the wheel support member on the vehicle body. After front transverse link and hit 1
1) A Lance Perth Link, which connects both transverse links and the vehicle body in the front-rear direction to position the wheels in the front-rear direction. In a rear suspension consisting of a suspension strut whose upper part is connected to the vehicle body, one end is connected to the vehicle body via a bushing, and the other end is connected to the rear of the wheel axis of the wheel support member or to the rear transverse link. At least each bushing provided on the car body is made to have the same rigidity, so when the car body turns, the point of application of the side force is shifted rearward with respect to the wheel axis by the pneumatic trail. However, since the force acting on the backup transverse link is shared by the assist link, the force acting on the rear transverse link can be dispersed. Therefore, the amount of deformation of the bushing between the front transverse link and the vehicle body can be made approximately the same as the amount of deformation of the bushing between the rear transverse link and assist link and the vehicle body. Therefore, toe-out of the wheels due to side force during cornering can be prevented, and stable cornering performance can be obtained. In addition, since each bushing provided on the car body has the same rigidity, the resonance points of each bushing provided on the car body can be unified.
Deterioration of sound vibration performance due to resonance can be prevented. Furthermore, freedom of design is not reduced due to interference between the single wheel and the housing. In addition, since the number of support points for the vehicle body increases by the amount of assist links, the force transmitted from the wheels to the vehicle body is dispersed, so the reinforcement of the front and rear transverse links and the vehicle body attack portion of the assist links is reduced by that amount. This makes it possible to reduce the weight of the vehicle body.

Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented in other forms than the above-described embodiments.

[Brief explanation of the drawing]

Figure 1 shows the inclination of the conventional Noriana Penji development, and Figure 2
The figure is a plan view of the same principle, FIG. 8 is an explanatory diagram of the same action, FIG. is an explanatory diagram of the same action. (Explanation of main symbols in the diagram) 1...Wheel 9, 11.28-Bush 8-1!1
1m) Lance sparse link 5-11 side Silence sparse link 18...Spindle (wheel support member)
21...Assist link 25.-Radius 9 dot 27.-Nass pension strut Fig. 1 Fig. 2 Fig. 1N3 Fig. *4E

Claims (1)

[Scope of Claims] A front transformer is installed between the vehicle body and a wheel support member that supports the wheels via a book, and is also provided at the front and rear with the wheel axis sandwiched between the vehicle body and the wheel support member that supports the wheels. A berth link and a rear transverse link, a radius rod that connects these transverse links and the vehicle body in the longitudinal direction to position the wheels in the longitudinal direction, and a radius rod that is disposed downward on the road and has a lower portion that connects both transverse links with the vehicle body. In a liana pension comprising a suspension strut whose upper part is connected to the vehicle body on a berth link,
An assist link is provided, one end of which is connected to the vehicle body via a pusher, and the other end of which is connected to the rear of the wheel axis of the wheel support member or to a rear transverse link, and at least each pusher provided on the vehicle body is connected to the same #Ii type. It is characterized by the fact that it's an anaspenji eye.