JPS626807A - Rear suspension for vehicles - Google Patents

Abstract

PURPOSE:To make an extent of sufficient link length securable while keeping off any interference between a lateral link and a fuel tank, by setting up a body side connecting point of one piece among plural lateral links at a position more ahead than the fuel tank. CONSTITUTION:A rear suspension consists of a trailing arm 1, being pivotally attached to a car body at the front end, supporting a wheel 16 at the rear end side and set up in a longitudinal direction of the car body along a side wall of a fuel tank 91 to be set up beneath the rear floor of a car, and plural lateral links 21-41 whose one end is connected to the car body and the other end to the arm respectively and to be set up sidelong of the car body. In the mentioned above, a body side pivoting point F of a piece among these lateral links 21-41, for example, the first lateral link 21 is set up in a position more ahead than the fuel tank 91. With this constitution, the first lateral link 21 having sufficient length is adoptable while keeping off any interference between the first lateral link and the fuel tank 91.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a trailing arm type rear 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,
2. Description of the Related Art A vehicle suspension system is known that includes three lateral links arranged in the lateral direction of the vehicle body.

If 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 pivot point on the vehicle body side of the trailing arm is JP-A-57-110513 discloses that a first lateral link is connected downwardly.

(Problems to be Solved by the Invention) Generally, a fuel tank is disposed under the rear floor of a vehicle, and the trailing arm is disposed on the side along the side wall of the fuel tank.

Therefore, when the first lateral link is connected near the pivot point on the vehicle body side of the trailing arm as described above, the link length of the first lateral link must be shortened to avoid interference with the fuel tank side wall. Moreover, since the links are short, it is also necessary to provide length adjustment means to correct manufacturing errors.

In addition, a certain link length is required to reduce wheel alignment changes due to wheel pound and rebound, but if the first lateral link is made longer, it becomes necessary to provide a corresponding recess in the side wall of the fuel tank, which increases the tank capacity. will decrease.

Therefore, an object of the present invention is to provide a rear suspension for a vehicle of the type described above, which is capable of obtaining sufficient link length and tank capacity while preventing interference between the first lateral link and the fuel tank. It is in.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a vehicle whose front end side is pivotally connected to the vehicle body, whose rear end side rotatably supports a wheel (1B), and which is disposed under the rear floor of the vehicle. a trailing arm (1) arranged in the longitudinal direction of the vehicle body along the side wall of the fuel tank (91);
and a plurality of lateral links (21), (31), and (41) connected to the vehicle body at one end and the trailing arm (1) at the other end and arranged in the lateral direction of the vehicle body. Multiple lateral links (
21) One of the vehicle body side pivot points (F) among , (31), and (41) is disposed in front of the fuel tank (91).

(Function) Since the connection point (F) on the vehicle body side of the first lateral link (21) is placed in front of the fuel tank (91), interference between the first lateral link (21) and the fuel tank (91) is prevented. At the same time, a sufficient length of the link (21) can be obtained, and the capacity of the tank (91) can also be secured. Since the first lateral link (21) is thus relatively long, changes in wheel alignment can also be suppressed.

(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 open 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) extending obliquely rearward and downward of the upper and lower protrusions (3) and (4) is formed, and the peripheral pieces (8) are spaced back and forth at the ends of the upper and lower protrusions (3) and (4). ) and (4) are respectively formed with U-shaped parts (9) and (to) 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 (1B) 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 (3) 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 (5), and the rubber bushing (22)
2) A support shaft whose axis passing through the interior is approximately in the longitudinal direction of the vehicle body (
23) 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 tubular 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 (32
) into the upper U-shaped part (9), and press the rubber boot.

A support shaft (33) passing through the shell (32) and having an axis substantially in the longitudinal direction of the vehicle body 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 attached to the U-shaped part (10). It will be constructed between the front and back of the

The length of these three links is the first lateral link (2
1) is set to be the shortest, then the second lateral link (31) is set to the longest, and the third lateral link (41) is set to 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 connected to each other, and the damper (51) is disposed rearward of the 22nd chiral link (31).

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

Next, the trailing arm (1), 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) (A support or shaft (25) that passes through the inside of the bracket (20) 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 the bracket (73).

Also, the cross member (85) at the rear of the rear frame (B1)
A U-shaped bracket (83) that opens outward is fixed on the outer surface in front of the part where the second lateral link (31) is constructed. (31) A support shaft (35) whose axis is parallel to the support shaft (33) at the outer end is installed between the front and rear of the bracket (83).

Furthermore, the cross member (E15) at the rear of the rear frame (81)
A U-shaped bracket (68) that opens downward is fixed on the lower surface near the end of the third latex link (41), and is inserted through the tubular rubber bushing (40) at the inner end of the third latex link (41), and
41) A support shaft (4) whose axis is parallel to the support shaft (43) at the outer end
5) will be installed between the front and rear of the bracket (BB).

Cross member (85)C of the rear frame (el)
F) The upper end of the damper (51) is connected to the damper housing (82) formed in the wheel house (81) portion on the outer side.

Member (72) and rear frame cross member (85)
, the trailing arm (1) is attached at the pivot point (E) to the first to third lateral links (21), (31).
, (41) are connected and supported at each pivot point (F), CG), (H), and the damper (51) is connected and supported to the wheel house (81) at the 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 (85), 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 (85). (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 (91).

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 (5), the pivot point (E) of the connection (1) is close to the middle part of the arm (1), so the length of the link is the same as in the example. A relatively short length will suffice.

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.

By connecting the first lateral link (21) forward of the pivot point (E) on the vehicle body side of the trailing arm, the span between the third lateral link (41) at the rear and the first lateral link (21) is increased. can be made larger than before, so that the toe rigidity against the side force acting on the grounding point of the tire (17) of the wheel (18) can be maintained sufficiently higher than before.

In the above, since the first lateral link (two pivot points (F) on the vehicle body side) is placed in front of the fuel tank (81), sufficient link length can be achieved while preventing interference with the fuel tank (91). The first lateral link (21) can be employed, and the capacity of the tank (81) can also be secured.

Therefore, since the first lateral link (21) is long to some extent, the bouncing and rebounding of the wheel (1B) causes a rocking displacement in the lateral direction of the vehicle body with respect to the trailing arm (1) that swings around the pivot point (E). This makes it possible to minimize wheel alignment changes.

(Effects of the Invention) As described above, according to the present invention, the front end side is pivotally connected to the vehicle body, the rear end side supports the wheel rotatably, and the fuel tank is mounted along the side wall of the fuel tank disposed under the rear floor of the vehicle. In a rear suspension for a vehicle, the plurality of lateral links are composed of a trailing arm arranged in the longitudinal direction of the vehicle body, and a plurality of lateral links connected to the vehicle body at one end and the trailing arm at the other end and arranged in the lateral direction of the vehicle body. Since the connection point on the vehicle body side of one of the links is placed in front of the fuel tank, sufficient link length can be obtained while preventing interference between the one lateral link and the fuel tank. Not only can capacity be secured, but changes in wheel alignment can also be kept to a minimum.

[Brief explanation of drawings]

Figure 1 is a perspective view of the Yasus Venge, Figures 2 to 4 are an open plan view, side view and rear view, Figure 5 is a plan view showing rear body components, Figures 6 and 7. The figures are a side view and a rear view. In the drawing, (1) is the trailing arm, (5) is the front extension, (15) is the axle, (18) is the wheel, (
21), (31), (41) are lateral links, (51)
) is a damper, and (91) is a fuel tank.

Claims (1)

[Scope of Claims] Trailing 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 along the side wall of a fuel tank located under the rear floor of the vehicle. The arm is connected to the vehicle body at one end and the trailing arm at the other end.
A rear suspension for a vehicle comprising a plurality of lateral links disposed in the lateral direction of the vehicle body, wherein a connection point on the vehicle body side of one of the plurality of lateral links is disposed forward of the fuel tank. rear suspension.