JPS626814A - Rear suspension for vehicles - Google Patents

Abstract

PURPOSE:To aim at reduction in the extent of link length, by connecting a piece among plural lateral links to a point more frontward than a pivoting part at the body side of a trailing arm, while setting up this body side connecting point in a position more frontward than a connecting point at the trailing arm side. CONSTITUTION:A rear suspension consists of a trailing arm 1, being pivotally attached to a car body at the front end side, supporting a wheel 16 at the rear end side, and to be set up in a longitudinal direction of the car body, and plural lateral links 21-40 whose one end is connected to the car body and the other side to the arm 1 respectively, and to be set up sidelong of the car body. In the mentioned above, a piece among these links 21-41, for example, the first link 21 is connected to a point more frontward than a body side pivoting point E. And, a body side pivoting point F of this first link 21 is set up in a position more frontward than an arm side pivoting point A. With this constitution, toe rigidity is highly maintainable, while a toe-in angle at the time of bounding or rebounding is enlargeable.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a trailing arm suspension for a vehicle.

(Prior technology) A trailing arm is pivotally attached to the vehicle body at the front end, rotatably supports the wheels at the rear end, and is arranged in the longitudinal direction of the vehicle, and one end is connected to the vehicle body and the other end is connected to the trailing arm. is,
A rear suspension for a vehicle is known that includes three lateral links arranged in the lateral direction of the vehicle body.

When the three lateral links are called the first to third lateral links from the front, the second and third lateral links are connected to the rear of the trailing arm, while the first lateral link is connected to the front and rear of the trailing arm. Connection to the intermediate portion is disclosed in JP-A-80-53408 and US Pat. No. 3,327-803, and also in JP-A-57-110.
No. 513 discloses that a first lateral link is connected below the vehicle body side pivot portion of the trailing arm.

(Problem to be Solved by the Invention) However, when the first lateral link is connected to the intermediate portion of the trailing arm as in the former case, this connection point extends far rearward from the pivot point on the vehicle body side at the front end of the trailing arm. Since they are separated, the first lateral link must be made long to ensure vertical swing of the trailing arm.

Furthermore, if the first lateral link is connected below the pivot point on the vehicle body side of the trailing arm as in the latter case, the length of the link can be short, but there is a problem that the minimum ground clearance becomes low.

Therefore, an object of the present invention is to provide the rear suspension of the above type with a short link length of the first lateral link, increase the minimum ground clearance, and at the same time reduce the side force acting on the wheels more effectively than before. To provide a rear suspension for a vehicle which can maintain high toe rigidity and can obtain a large amount of toe-in when a wheel bounces or rebounds by devising the arrangement of a first lateral link.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a wheel (1B) which is pivotally attached to the vehicle body on the front end side, rotatably supports the wheel (1B) on the rear end side, and is arranged in the longitudinal direction of the vehicle body. a trailing arm (1) connected to the vehicle body at one end and the trailing arm (1) at the other end;
Multiple lateral links (21) arranged in the lateral direction of the vehicle body
, (31), and (41), wherein the plurality of lateral links (21)
, (31), and (41) forward from the vehicle body side pivot point (E) of the trailing arm (1), and the vehicle body side connection point of the one lateral link (21). (F) is placed forward of the trailing arm side connection point (A).

(Function) Since the first lateral link (21) is connected to the front side of the vehicle body side pivot part (E) of the trailing arm (1), the first lateral link (21) is connected to the intermediate part of the arm (1). 21) is located near the vehicle body side pivot joint (E), so its link length only needs to be short.

Furthermore, since there is no link below the vehicle body side pivot joint (E), the minimum ground clearance can be increased. Furthermore, since the first lateral link (21) exists ahead of the vehicle body side pivot joint (E),
The span with the third lateral link (41) that contributes to toe rigidity can be made larger than before, and toe rigidity can be maintained high.

And the connection point (F) on the vehicle body side of the first lateral link (21)
) is placed forward of the trailing arm side connection point (A), so when the wheel (16) bounces or rebounds, the trailing arm (1) is A retraction amount (y z) for moving the arm extension (5) in front of the pivot point (E) toward the inside of the vehicle body by the first lateral link (21) as it swings around the pivot point (E) on the vehicle body side. However, when the link (21) is arranged parallel to the lateral direction of the vehicle body as shown in Fig. 8(b),
o) Since it becomes larger, a large amount of toe-in can be taken.

(Example) Examples will be described below based on the accompanying drawings.

Figure 1 is a perspective view of this rear suspension, and Figures 2 to 4 are the same plane, side, and rear views.The trailing arm (1) has its plate surface (2) in the vertical direction, and faces toward the inside of the vehicle body. It is a steel plate press-formed product having a bent peripheral edge piece (6), and is formed as a rigid body particularly in the longitudinal direction of the vehicle body. An axle (15) is fixed to the rear of the vertical plate surface (2) of this trailing arm (1), and the axle (15) protrudes outward. A rubber bushing (18) of the tubular material with the same direction is fixed. Furthermore, the vertical plate surface (2
) extends diagonally forward and upward of the axle (15).
3), and an axle (
A protrusion (0) is formed that extends diagonally rearward and downward of the upper and lower protrusions (3), and the peripheral pieces (6) are spaced back and forth at the ends of the upper and lower protrusions (3) and (4), respectively. ) and (4) are respectively formed with U-shaped parts (9) and (10) that are open to the inside of the vehicle body and are formed by opposing front peripheral edge pieces (7) and rear peripheral edge pieces (8).

A reinforcing plate (11) is fixed on the inside of the rear part of the trailing arm (1) across the front and rear peripheral parts (7) and (8), and a reinforcing plate (12) is also installed on the inside of the front part of the front part. A rear reinforcing plate (11) is fixedly installed between the upper and lower sides of the peripheral edge piece (7).
) to the base end of the axle (15), and the front reinforcing plate (1
2) The tube rubber bushings (18) are fixedly attached to each of the tubes.

The wheel (16) is rotatably assembled to the axle (15) of the trailing arm (1), and the extension part (
5) is connected to the first lateral link (21), the second lateral link (31) is connected to the upper U-shaped part (9) at the rear of the trailing arm (1), and the third lateral link is connected to the lower U-shaped part (10). The lateral links (41) are connected respectively.

The first lateral link (21) is made of a steel plate channel member that opens downward, and tubular rubber bushings (22) and (24) whose axes are in the front-rear direction are fixed at both ends of the first lateral link (21). The tube rubber bushing (22) at the outer end of the tube faces into the extension part (5), and the rubber bushing (
22) A support shaft (23) with its axis passing through the inside substantially in the longitudinal direction of the vehicle body is installed between the front end of the peripheral edge piece (7) in front of the extension part (5) and the stay (13) fixed to the rear thereof.

The second lateral link (31) is made of a steel plate, and tube rubber bushings (32) and (34) whose axes are perpendicular to the plate surface are fixed at both ends of the second lateral link (31). Tube rubber bushing at outer end (32)
into the upper U-shaped part (9), and insert the rubber bushing (32
) with the axis passing through it approximately in the longitudinal direction of the vehicle body (3
3) is installed between the front and rear of the U-shaped portion (8).

The third lateral link (41) is made of a steel plate channel member that opens downward, and tubular rubber bushings (42) and (44) whose axes are in the front and back direction are fixed to both ends of the third lateral link (41). The tubular rubber bushing (42) at the outer end of the tube faces into the lower U-shaped part (10), and the support shaft (43) whose axis passing through the rubber bushing (42) is approximately in the longitudinal direction of the vehicle body is connected to the U-shaped part (lO). It will be constructed between the front and back of the

The lengths of these three links are! sl lateral link (
21) to be the shortest, then the second lateral link (31) to be the longest, and the third lateral link (4) to be the longest.

A damper (51) is attached to a support shaft (52) whose axis is in the longitudinal direction of the vehicle body near the outer end of the third lateral link (41).
The lower ends of the damper (51) are arranged behind the second lateral link (31).

In this way, the first to third
The lateral links (21), (31), and (41) are connected to each pivot point (A), (B), and (C), and the damper (52) is attached to the third lateral link (41) at the pivot point. (D)
Connect each with .

Next, along with FIGS. 5 to 7 showing the rear vehicle body components, the trailing arm (1), the lateral link (21),
(31), (41) and the connection of the damper (51) to the vehicle body will be explained.

First, place the tubular rubber bushing (18) near the front end of the trailing arm (1) into the downwardly opening bracket (82) fixed to the lower surface near the front of the rear frame (81), and then insert the rubber bushing (18). A support shaft (19) is installed between the left and right sides of the bracket (82), with its axis passing through the bracket (19) substantially in the lateral direction of the vehicle body.

On the other hand, a U-shaped bracket (73) that opens downward is fixed to the end of the cross member (72) in front of the rear floor (71) in front of this, and the tube rubber bushing at the inner end of the first lateral link (21) (24) A support shaft (25) that is inserted through the inside and whose axis is parallel to the support shaft (23) at the outer end of the link (21) is installed between the front and rear of (73).

Also, the cross member (B5) at the rear of the rear frame (81)
A U-shaped bracket (83) that opens outward is fixed on the outer surface in front of the part where the bracket is installed, and is inserted into the tubular rubber bush (34) at the inner end of the second lateral link (31). A support shaft (35) whose axis is parallel to the support shaft (33) at the outer end of the link (31) is installed between the front and rear of the plaquette (83).

Furthermore, the cross member (85) at the rear of the rear frame (81)
There is a U-shaped bracket (
ee), and insert the tubing rubber bushing (40) at the inner end of the third lateral link (41), and insert the link (4
1) A support shaft (45) whose axis is parallel to the support shaft (43) at the outer end
) is installed between the front and rear of the bracket) (8B).

Cross member (65) + of the rear frame (81)
7) Connect the upper end of the damper (51) to the damper housing (82) formed in the wheel house (81) portion on the outer side.

Thus, the trailing arm (1) is attached to the rear frame (61), rear floor gross member (72), and rear frame cross member (85) at the pivot point (E), and the first to third lateral links ( 21), (31), (41
) are connected and supported at each pivot point (F), (G), and (H), and a damper (51) is connected and supported to the wheel house (81) at a connection point (I).

By the way, a fuel tank (81) is arranged in a space below the rear of the rear floor (71) and in front of the rear frame cross member (65), and a pivot point on the vehicle body side of the first lateral link (21) is located in the space in front of the rear frame cross member (65). (F) is the fuel tank (91)
The vehicle body side pivot point (H) of the third lateral link (41) is located at the rear of the fuel tank (81), and the vehicle body side pivot point (H) of the second lateral link (31) is located at the rear of the fuel tank (81). G
) is located above the fuel tank (81).

As mentioned above, in particular, the trailing arm (1) is formed with an extension part (5) that protrudes forward from the pivot point (E) on the vehicle body side,
Since the first lateral link (21) is connected to this front extension part (5), the first lateral link (21) is connected to the pivot point (E) of the arm (1) compared to the case where it is connected to the intermediate part of the arm (1). Therefore, the link length need only be relatively short as in the embodiment.

Further, since there is no link below the pivot point (E) on the vehicle body side of the trailing arm (1), the minimum ground clearance can be increased.

And the pivot point (E) on the vehicle body side of the trailing arm (1)
By connecting the first lateral link (21) further forward, the span between the third lateral link (41) at the rear and the first lateral link (21) can be made larger than before, so that the wheels (16) The toe rigidity against the side force acting on the grounding point of the tire (17) can be maintained sufficiently higher than before.

In the above, since the vehicle body side pivot point (F) of the first lateral link (21) is arranged forward of the trailing arm side pivot point (A), the fuel tank (91) and the first lateral link (21) It is possible to prevent interference between wheels (1B) and increase the amount of toe-in especially when the wheel (1B) bounces or rebounds.

In other words, if the first and third lateral links (21) and (41) are arranged parallel to the lateral direction of the vehicle body as shown in Figure 8(b), the trailing during bounce and rebound will occur as shown in Figure 8(a). As the arm (1) swings around the pivot point (E) on the vehicle body side, the retraction amount (x
o), the arm extension (5) in front of the pivot point (E)
) by the first lateral link (21) (y
Since o) is only slightly large, the amount of toe-in is also small.

On the other hand, as shown in Fig. 8(C), the first lateral link (
21) is placed diagonally in a plan view, the arm extension (5) in front of the pivot point (E) during bounce and rebound.
The amount of retraction (y o
) increases, and y+>y compared to FIG. 8(b).

Therefore, a large amount of toe-in can be obtained.

(Effects of the Invention) As described above, according to the present invention, the trailing arm is pivotally attached to the vehicle body on the front end side, rotatably supports the wheels on the rear end side, and is disposed in the longitudinal direction of the vehicle body, and the trailing arm has one end. In a vehicle rear suspension consisting of a plurality of lateral links arranged in the lateral direction of the vehicle body, the other end of which is connected to a trailing arm, one of the plurality of lateral links is pivotally connected to the vehicle body side of the trailing arm. In addition, the connection point on the vehicle body side of this one lateral link is placed forward of the connection point on the trailing arm side, compared to when this one lateral link is connected to the middle part of the trailing arm. The length of the link can be shortened, and since there is no lateral link below the pivot point on the vehicle body side of the trailing arm, the minimum ground clearance can be increased. By connecting the lateral link further forward, the span between this link and the rear lateral link can be made larger than before, making it possible to maintain high toe rigidity and also increasing the amount of toe-in during bounce and rebound. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the present rear suspension, Figs. 2 to 4 are a plan view, side view, and rear view of the same, Fig. 5 is a plan view showing rear vehicle body components, and Figs. 6 and 7 are The same side view and rear view, and FIGS. 8(a), (b), and (C) are schematic side views showing the swinging of the trailing arm and a schematic diagram of a comparative example in which the first lateral link is arranged in the lateral direction of the vehicle body. FIG. 2 is a schematic plan view of the present structure in which the links are arranged diagonally. In the drawing, (1) is the trailing arm, (5) is the front extension, (15) is the axle, (16) is the wheel, (
21), (31), and (41) are lateral links,
(51) is a damper. Patent applicant: Agent for Honda Motor Co., Ltd.
Patent Attorney Part 2 1) Part 1 Patent Attorney
Kuni Ohashi, Patent Attorney, Department
Yama Yuyuki Patent Attorney No 1)
Shigeru Figure 8

Claims (1)

[Scope of Claims] A trailing arm whose front end side is pivotally connected to the vehicle body, whose rear end side rotatably supports wheels, and which is arranged in the longitudinal direction of the vehicle body, and whose one end is connected to the vehicle body and the other end is connected to the trailing arm. is,
In a vehicle rear suspension comprising a plurality of lateral links arranged in the lateral direction of the vehicle body, one of the plurality of lateral links is connected to the front of the vehicle body side pivot point of the trailing arm, and the one A rear suspension for a vehicle, characterized in that a connection point on the vehicle body side of a lateral link is located forward of a connection point on the trailing arm side.