JPH07186680A - Multi-link type suspension device - Google Patents

Abstract

PURPOSE:To sufficiently develop the function of a stabilizer by effectively torsion-deforming the torsion part of the stabilizer, even if a knuckle moves vertically. CONSTITUTION:A muitilink type suspension device is equipped with a knuckle N which is supported in a vertically movable manner on a car body through a traling arm TR and a leading arm LE, stabilizer ring 33 which extends downward from the upper part of the knuckle N, and a stabilizer 29 which consists of a torsion part 291 and an arm part 292. The torsion part 291 of tje stabilizer 29 is supported on angle alpha formed by the arm part 292 extendidg to the front part of the car body and the lower end of the stabilizer ring 33 is always kept at a nearly right angle, even if the knuckle N moves vertically along a locus L.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-link type equipped with a knuckle for supporting wheels, a plurality of arms for connecting the knuckle to a vehicle body so that the knuckle can move up and down, and a stabilizer for connecting the left and right knuckles to each other. Suspension device.

[0002]

2. Description of the Related Art A stabilizer having a torsion part and an arm part for connecting left and right knuckles to each other twists and deforms the torsion part when left and right wheels move up and down in different phases, and the elastic restoring force of the torsion part causes the deformation. It has the function of increasing the roll rigidity of the suspension system by eliminating the vertical phase difference between the left and right wheels. Conventionally, the torsion portion of the stabilizer is supported in the vehicle body left-right direction at a position in front of the knuckle, and the tips of a pair of arm portions extending rearward of the vehicle body from both ends of the torsion portion extend downward from the upper portions of the left and right knuckles. It was connected to the lower ends of a pair of stabilizer links.

[0003]

FIG. 8 shows a conventional multi-link suspension system, and is a view of the right rear wheel as seen from the inside of the vehicle body.

As is clear from the figure, the stabilizer 2
The angle α formed by the arm portion 29 ₂ extending rearward from the torsion portion 29 ₁ of the vehicle body 9 and the stabilizer link 33 extending downward from the upper portion of the knuckle N is set to be substantially right angle, which allows the knuckle N to move up and down sufficiently. To the arm 29
₂ is transmitted to the torsion portion 29 ₁ so that the torsion portion 29 ₁ is effectively twisted and deformed.

By the way, a trailing arm TR which extends from the vehicle body side support point to the vehicle body rear side and is connected to the lower portion of the knuckle N, and a leading arm which extends from the vehicle body side support point to the vehicle body front and is connected to the upper portion of the knuckle N. The multi-link suspension system including the arm LE moves on a locus L extending from the lower front of the vehicle to the upper rear of the vehicle when the knuckle N moves up and down. Therefore, even if the angle α is set to a substantially right angle at the neutral position where the knuckle N does not move up and down, α is larger than the right angle when the knuckle N moves upward (bump stroke).
_When the knuckle N moves downward (rebound stroke), α changes to α ₂ which is smaller than the right angle, and the vertical movement of the knuckle N is sufficiently transmitted to the arm 29 ₂ to move the torsion portion 29 ₁ . There is a problem that it cannot be effectively twisted and deformed.

The present invention has been made in view of the above circumstances, and an object thereof is to effectively twist and deform the torsion portion of the stabilizer by the vertical movement of the knuckle so that the stabilizer functions efficiently.

[0007]

In order to achieve the above object, the invention described in claim 1 is a knuckle for supporting a wheel and a knuckle below a vehicle axle extending rearward from a vehicle body side supporting point. A trailing arm connected to the vehicle body, a leading arm that extends forward from the vehicle body side support point to the knuckle above the axle, and a leading arm that extends from the vehicle body side support point in the vehicle width direction and is connected to the knuckle body. A stabilizer that includes a lateral arm, a torsion part that extends in the width direction of the vehicle body and is supported by a stabilizer holder, and an arm part that is integrally connected to both ends of the torsion part, and the upper end is connected to the upper part of the knuckle and extends downward. A stabilizer link having a lower end coupled to a tip of an arm portion of the stabilizer, and a stabilizer link comprising: Da The provided on the vehicle body rearward from the knuckle, characterized in that the concatenation of the end of the arm portion extending forward of the vehicle body from the torsion portion of the stabilizer at the lower end of the stabilizer link.

Further, in the invention described in claim 2, in addition to the structure of claim 1, the movement locus of the connecting portion between the knuckle and the upper end of the stabilizer link is made substantially coincident with an arc centered on the stabilizer holder. It is characterized by

According to the invention described in claim 3, in addition to the structure of claim 1, the axis line of the outer end mounting portion of the lateral arm provided on the knuckle and the axis line of the upper end mounting portion of the stabilizer link are formed in parallel. It is characterized by having done.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 7 show an embodiment of the present invention. FIG. 1 is a plan view of a rear portion of a vehicle body, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. 3 is a three-direction arrow view of FIG. Fig. 4, Fig. 4 is an enlarged view in the four directions of Fig. 1, Fig. 5 is a single view of the knuckle viewed from the same direction as Fig. 4, Fig. 6 is a view in the six directions of Fig. 5, and Fig. 7 corresponds to Fig. 4. It is explanatory drawing of the effect | action to do.

As shown in FIG. 1, a sub-frame SF that supports rear suspensions RS and RS for suspending left and right rear wheels W and W of a front-wheel drive vehicle includes a pair of left and right side members 1 and 1, and both side members. A front cross member 2 and a rear cross member 3 that connect between the front ends and the rear ends of the terminals 1 and 1 are provided. 4 on the front and rear ends of both side members 1, 1.
The individual rubber bush mounts 4 ... Are provided, and these rubber bush mounts 4 ...
Are supported by the main frame MF.

The left and right rear suspensions RS, RS have the same structure, and the structure of the right rear suspension RS will be described below.

As will be apparent with reference to FIGS. 2 to 4 as well, the rear wheel W comprising the tire 5, the wheel 6 and the brake disc 7 is connected to the axle A (integrated with the knuckle N via the hub H of the wheel 6). It is rotatably supported by (see FIG. 6). The outer arm and the inner end of the upper arm UP are respectively connected to the upper arm mounting arm 8 protruding upward from the knuckle N and the bracket 9 provided on the sub-frame SF via elastic joints, and the upper arm UP is moved upward from the knuckle N. The outer end and the inner end of the leading arm LE are connected to the protruding arm mounting arm 12 and the bracket 13 provided on the sub-frame SF via elastic joints. The upper arm UP and the leading arm LE are disposed above the axle A, the upper arm UP extends in the left-right direction of the vehicle body in a plan view, and the leading arm LE extends from the vehicle body rear inside to the vehicle front outside.

An outer end of the lower arm LO is connected via an elastic joint between a lower arm mounting arm 16 projecting downward from the knuckle N and a trailing arm mounting arm 20 described later, and an inner end of the lower arm LO is a sub-arm. It is connected to a bracket 17 provided on the frame SF via an elastic joint. The trailing arm mounting arm 20 protruding downward from the knuckle N and the bracket 21 provided on the sub-frame SF are connected to the outer end and the inner end of the trailing arm TR via elastic joints. The lower arm LO and the trailing arm TR are disposed below the axle A, the lower arm LO extends in the left-right direction of the vehicle body in a plan view, and the trailing arm TR extends from the vehicle body front inside to the vehicle rear outside.

The outer end and the inner end of the control arm CO are connected to a control arm mounting arm 24 projecting to the rear of the knuckle N and a bracket 25 provided on the sub-frame SF via elastic joints. The control arm CO extends in the left-right direction of the vehicle body.

The damper mounting arm 28 protruding from the knuckle N to the opposite side of the axle A is connected to the lower end of a damper D whose upper end is supported by the vehicle body.

As best shown in FIG. 1, the stabilizer 29 connecting the left and right knuckles N has a torsion portion 29 ₁ extending in the left-right direction of the vehicle body, and the torsion portion 2
A pair of left and right arm portions 29 ₂ and 29 ₂ extending from the left and right ends of 9 ₁ to the front of the vehicle body are provided. The torsion portion 28 ₁ of the stabilizer 28 is provided with a pair of left and right brackets 30 and 30 provided at the rear ends of the left and right side members 1 and 1 of the sub-frame SF in the vicinity of the left and right ends thereof via the stabilizer holders 31 and 31, respectively. Elastically supported.

[0019] As is apparent from FIG. 4, and the front end of the arm portion 29 ₂ of the stabilizer link mounting arm 32 and the stabilizer 29 which is formed integrally with the intermediate portion of the upper arm mounting arms 8 of the knuckle N, extends vertically The upper and lower ends of the stabilizer link 33 are connected via rubber bush joints 34 and 35, respectively. When the knuckle N is in the neutral position where it does not move up and down, the angle formed by the stabilizer link 33 extending in the vertical direction and the arm portion 29 ₂ extending in the vehicle front-rear direction is the most efficient way to twist the torsion portion 29 ₁ of the stabilizer 29. It is set to a substantially right angle α which is an angle at which the twist deformation is possible.

Next, based on FIGS. 5 and 6, the knuckle N
The structure of a single item will be described.

As described above, the knuckle N is the axle A, the upper arm mounting arm 8, the leading arm mounting arm 1
2. The lower arm mounting arm 16, the trailing arm mounting arm 20, the control arm mounting arm 24, and the stabilizer link mounting arm 32 are integrally provided. An axis a of a mounting hole 8 ₁ for mounting an elastic joint on the upper arm mounting arm 8, an axial b of a mounting hole 16 ₁ for mounting an elastic joint on the lower arm mounting arm 16 and the trailing arm mounting arm 20, and an elastic joint for the control arm mounting arm 24. The mounting hole 3 for mounting the elastic joint on the axis c of the mounting shaft 24 ₁ for mounting the
The axis d of 2 ₁ extends in parallel to the lateral direction of the vehicle body. Therefore, the three mounting holes 8 ₁ , 16 ₁ , 32 ₁ and one mounting shaft 24 ₁ can be simultaneously machined by a multi-axis machine tool, thereby reducing the man-hours and reducing the machining cost. be able to.

Next, the operation of the embodiment of the present invention having the above-mentioned structure will be described mainly with reference to FIG. Figure 7
4 is a view of the right rear wheel W as seen from the inside of the vehicle body, and corresponds to FIG. 4 showing the present embodiment and FIG. 8 showing the conventional example.

When the rear wheel W rides on a step or pebbles on the road surface while the vehicle is running, the knuckle N bumps upward from the neutral position while contracting the damper D, and then the damper D.
The coil spring rebounds downwardly beyond the neutral position due to the elastic force, and returns to the neutral position by the vibration damping action of the shock absorber of the damper D while alternately repeating the bump and the rebound. At this time, the trailing arm TR is attached to the bracket 21 of the subframe SF.
From the rear of the knuckle N to the trailing arm attachment arm 20 at the lower part of the knuckle N, and the leading arm LE extends from the bracket 13 of the sub-frame SF to the front of the vehicle body and extends above the knuckle N. Since the knuckle N is connected to the vehicle body 12, the knuckle N moves up and down on a locus L connecting the lower front portion of the vehicle body and the upper rear portion of the vehicle body.

At this time, since the knuckle N moves in parallel along the locus L without rotating, the position of the stabilizer link mounting arm 32 of the knuckle N, that is, the upper end position of the stabilizer link 33 is also parallel to the locus L. A locus L '
Move up. As is clear from FIGS. 7 and 4, the locus L ′ of the upper end position of the stabilizer link 33 substantially coincides with the circular arc R centered on the stabilizer holder 31. Therefore, even if the upper end of the stabilizer link 33 moves up and down along with the knuckle N along the locus L ', the stabilizer holder 31, the upper end of the stabilizer link 33 (rubber bush joint 34) and the lower end of the stabilizer link 33 (rubber bush joint 35). ) triangular shape is not deformed, which is formed by the angle α formed between the arm portion 29 ₂ of the stabilizer link 33 and the torsion bar 29 is always substantially perpendicular held constant. Therefore, unlike the conventional one in FIG. 8, the vertical movement of the knuckle N causes the stabilizer link 3 to move.
The torsion portion 29 ₁ can be effectively twisted and deformed through ₃ , 33 and the arm portions 29 ₂ and 29 _2, and the function of the stabilizer 29 can be fully exerted.

In FIG. 4, the knuckle N follows the locus L.
Even if it is moved up and down, as described above, the stabilizer link 3
3 and arm part 29₂The angle α formed by
Therefore, the stabilizer link 33 almost swings in the direction of arrow P.
It does not move, so in FIG.
Mounting hole 32 of Zallink mounting arm 32₁The axis d of
-Mounting hole 8 for arm mounting arm 8₁Axis a, lower arm
Mounting hole 16 for arm 16 ₁Axis b and control arm
Mounting shaft 24 of the arm mounting arm 24₁Formed parallel to the axis c of
It becomes possible to process the knuckle N as described above.
Strikes can be reduced.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-mentioned embodiments, and various design changes can be made.

[0027]

As described above, according to the invention as set forth in claim 1, even if the vertical external force acts on the wheel and the knuckle moves on the locus connecting the front lower part of the vehicle body and the upper rear part of the vehicle body. Since the stabilizer holder is provided behind the knuckle, the distance between the stabilizer holder and the connecting portion that connects the upper end of the stabilizer link to the knuckle does not change significantly. As a result, even if the knuckle moves, the angle formed by the stabilizer arm and the stabilizer link does not change significantly, and the stabilizer can be effectively operated.

According to the invention described in claim 2,
By substantially matching the movement path of the connecting part between the knuckle and the upper end of the stabilizer link with the arc centering on the stabilizer holder, the change in the angle between the stabilizer arm and the stabilizer link is prevented, and the stabilizer is more effective. Can be activated.

According to the invention described in claim 3,
By forming the axis line of the outer end mounting part of the lateral arm provided on the knuckle and the axis line of the upper end mounting part of the stabilizer link in parallel, it is possible to process each of the mounting parts at the same time and reduce the processing cost. It

[Brief description of drawings]

FIG. 1 is a plan view of a rear part of a vehicle body.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a three-direction arrow view of FIG.

FIG. 4 is an enlarged view in the four directions of FIG.

FIG. 5 is a single view of the knuckle viewed from the same direction as FIG.

FIG. 6 is a view in the direction of arrow 6 in FIG.

FIG. 7 is an explanatory diagram of an operation corresponding to FIG.

FIG. 8 is an explanatory view of the operation of the conventional example.

[Explanation of symbols]

A Axle CO Control arm (lateral arm) LE Leading arm LO Lower arm (lateral arm) N Knuckle TR Trailing arm UP Upper arm (lateral arm) W Rear wheel (wheel) a to d Axle 8 ₁ Mounting hole (mounting part) 16 ₁ Mounting hole (mounting part) 24 ₁ Mounting shaft (mounting part) 32 ₁ Mounting hole (mounting part) 29 Stabilizer 29 ₁ Torsion part 29 ₂ Arm part 31 Stabilizer holder 33 Stabilizer link

Claims (3)

[Claims] 1. A knuckle (N) for supporting a wheel (W).
And a trailing arm (T that extends rearward from the vehicle body side support point and is connected to the knuckle (N) below the axle (A).
R) and a leading arm (L) that extends from the vehicle body side support point to the front of the vehicle body and is connected to the knuckle (N) above the axle (A).
E) and a knuckle (N) extending in the width direction of the vehicle body from a support point on the vehicle body side.
The lateral arm (UP, LO, CO) connected to the torsion arm (UP), the torsion arm (29 ₁ ) extending in the width direction of the vehicle body and supported by the stabilizer holder (31), and integrally connected to both ends of the torsion part (29 ₁ ). Installed arm part (2
9 ₂ ) a stabilizer (29) and an upper end connected to an upper part of the knuckle (N) and extending downward,
In multi-link suspension system lower end with a, a stabilizer link (33) connected to the distal end of the arm portion (29 ₂₎ of the stabilizer (29), the vehicle body than the stabilizer the holder (31) a knuckle (N) An arm portion (29 ₂ ) provided on the rear side and extending from the torsion portion (29 ₁ ) of the stabilizer (29) to the front of the vehicle body.
The multi-link type suspension device, characterized in that the tip of the is connected to the lower end of the stabilizer link (33). 2. The moving locus of the connecting portion between the knuckle (N) and the upper end of the stabilizer link (33) is made to substantially coincide with an arc centered on the stabilizer holder (31). The described multi-link suspension system. 3. An outer end mounting portion (8 ₁ , 1) of a lateral arm (UP, LO, CO) provided on a knuckle (N).
The multi-link according to claim ₁ , wherein the axes (a to c) of 6 ₁ , 24 ₁ ) and the axis (d) of the upper end mounting portion (32 ₁ ) of the stabilizer link (33) are formed in parallel. Suspension system.