JPH0544362B2 - - Google Patents

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 art) The front end side is pivotally connected to the vehicle body, the rear end side rotatably supports the wheels, and the trailing arm is arranged in the longitudinal direction of the vehicle body, and one end is connected to the vehicle body and the other end is connected to the trailing arm. , 3 placed in the lateral direction of the vehicle body
Rear suspensions of vehicles consisting of lateral links are known.

When the three lateral links are called the first to third lateral links from the front, the second
JP-A-60-53408 and U.S. Patent No. 3,327,803 disclose that the third lateral link is connected to the rear part of the trailing arm, and the first lateral link is connected to the front and rear intermediate portions of the trailing arm. Japanese Patent Laid-Open No. 57-110513 discloses that a first lateral link is connected below the pivot portion of the trailing arm on the vehicle body side.

(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 a rear suspension of the type described above, in which the link length of the first lateral link can be shortened to a certain extent, and the minimum ground clearance can be increased, and at the same time, the side forces acting on the wheels can be reduced. To provide a rear suspension for a vehicle that can maintain toe rigidity higher than before.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a trailing wheel whose front end side is pivotally connected to the vehicle body, whose rear end side rotatably supports the wheels 16, and which is disposed in the longitudinal direction of the vehicle body. Arm and one end to the vehicle body and the other end to the trailing arm 1
It consists of a plurality of lateral links 21, 31, 41 movably connected to and arranged in the lateral direction of the vehicle body, and one of the plurality of lateral links 21, 31, 41 is placed on the rear end side of the trailing arm 1. In the rear suspension of the vehicle, an extension is formed on the front end side of the trailing arm 1 and projects forward from the vehicle body side pivoting part E, and the extension part 5 is provided with the plurality of lateral links 21, 31, 41. Connect the other one.

(Function) Since the first lateral link 21 is connected to the extension portion 5 in front of the vehicle body side pivot point E of the trailing arm 1, the first lateral link 21 is connected to the vehicle body side more than when connected to the intermediate portion of the arm 1. Since it is located near section E, the length of the link needs to be short to some extent. Furthermore, since there is no link below the vehicle body side pivot point E, the minimum ground clearance can be increased. Furthermore, since the first lateral link 21 is located forward of the vehicle body side pivot point E, the span with the third lateral link 41 on the rear end side of the trailing arm 1, which contributes to toe rigidity, can be made larger than before, and the toe rigidity is increased. Can be maintained high.

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

Figure 1 is a perspective view of the rear suspension, Figure 2 is a perspective view of the rear suspension.
The trailing arm 1 is a steel plate press-formed product with a plate surface 2 in the vertical direction and a peripheral edge piece 6 bent toward the inside of the vehicle body. Form as a rigid body in the direction. At the rear of the vertical plate surface 2 of this trailing arm 1 is an axle 15 that projects outward.
A rubber bushing 18 with a tube is fixedly attached to the front part of the vertical plate surface 2, and the axis thereof is substantially in the lateral direction of the vehicle body. Further, a protrusion 3 extending diagonally forward and upward of the axle 15 is formed on the vertical plate surface 2, and a protrusion 4 extending diagonally rearward and downward of the axle 15 is formed on the vertical plate surface 2, and this vertical protrusion A U-shaped part 9 that is open to the inside of the vehicle body, with the peripheral edge pieces 6 separated back and forth at the ends of the parts 3 and 4, and the front peripheral edge piece 7 and the rear peripheral edge piece 8 facing the upper and lower protruding parts 3 and 4; 10 each.

A reinforcing plate 11 is fixed on the inside of the rear part of the trailing arm 1 across the front and rear peripheral pieces 7 and 8, and a reinforcing plate 12 is fixed on the inside of the front part between the upper and lower front peripheral pieces 7. installed, rear reinforcement plate 11
the base end of the axle 15, and the front reinforcing plate 12.
The rubber bushings 18 with tubes are respectively fixedly installed.

The wheel 16 is rotatably assembled to the axle 15 of the trailing arm 1, and the extension portion 5 in front of the rubber bushing 18 with a tube of the trailing arm 1
A first lateral link 21 is connected to the rear portion of the trailing arm 1, a second lateral link 31 is connected to the upper U-shaped portion 9 at the rear of the trailing arm 1, and a third lateral link 41 is connected to the lower U-shaped portion 10.

The first lateral link 21 is made of a steel plate channel material that opens downward, and has rubber bushings 22 and 24 with tubes fixed at both ends thereof, and the rubber bushings 22 and 24 with tubes at the outer end of the first lateral link 21 22 faces inside the extension part 5, and a support shaft 23 whose axis passing through the rubber bush 22 is approximately 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 material, and rubber bushings 32 and 34 with tubes whose axes are perpendicular to the plate surface are fixedly installed at both ends of the second lateral link 31.
A rubber bushing 32 with a tube at the outer end of the lateral link 31 faces inside the upper U-shaped portion 9, and a support shaft 33 is installed between the front and rear of the U-shaped portion 9, with the axis passing through the rubber bushing 32 extending approximately in the longitudinal direction of the vehicle body. .

The third lateral link 41 is made of a steel plate channel material that opens downward, and has rubber bushings 42 and 44 with tubes fixed at both ends thereof, and the rubber bushings with tubes at the outer end of the third lateral link 41. 42 faces inside the lower U-shaped portion 10, and a support shaft 43 is installed between the front and back of the U-shaped portion 10, with the axis passing through the rubber bush 42 extending approximately in the longitudinal direction of the vehicle body.

The lengths of these three links are such that the first lateral link 21 is the shortest, the second lateral link 31 is the shortest, and the second lateral link 31 is the shortest.
is set to be long, and the third lateral link 41 is set to be the longest.

The damper 5 is connected to the outer side of the third lateral link 41 by a support shaft 52 whose axis is in the longitudinal direction of the vehicle body.
1 and the damper 51 is disposed rearward from the second lateral link 31.

In this way, the first to third lateral links 21, 31, and 41 are connected to the trailing arm 1 at the pivot points A, B, and C, and the damper 51 is connected to the third lateral link 41 at the pivot point D, respectively. Link.

Next, along with Figures 5 to 7 showing the rear vehicle body components, the trailing arm 1 and the lateral link 2.
The connection of 1, 31, 41 and the damper 51 to the vehicle body will be explained.

First, the rubber bushing 18 with a tube located near the front end of the trailing arm 1 is placed facing into the bracket 62 that is fixed to the lower surface of the rear frame 61 near the front and opens downward, and the axis passing through the inside of the rubber bushing 18 is aligned approximately in the lateral direction of the vehicle body. The supporting shaft 19 is attached to the bracket 62.
It will be constructed between the left and right sides of the

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, and the first lateral link 21
A support shaft 25 is installed between the front and rear of the bracket 73, passing through the tube-equipped rubber bushing 24 at the inner end of the link 21 and having an axis parallel to the support shaft 23 at the outer end of the link 21.

Also, the cross member 65 at the rear of the rear frame 61
A U-shaped bracket 63 that opens outward is fixed on the outer surface in front of the part where the second lateral link 31 is constructed, and a rubber bushing 34 with a tube at the inner end of the second lateral link 31 is fixed.
A support shaft 35 is inserted between the front and rear of the bracket 63 and whose axis is parallel to the support shaft 33 at the outer end of the link 31.

Furthermore, the cross member 65 at the rear of the rear frame 61
A U-shaped bracket 66 that opens downward is fixed on the lower surface near the end of the bracket, and is inserted into the tube-equipped rubber bushing 44 at the inner end of the third lateral link 41, and is aligned with the support shaft 43 at the outer end of the link 41. A parallel support shaft 45 is installed between the front and rear of the bracket 66.

The upper end of the damper 51 is connected to a damper housing 82 formed at a portion of the wheel house 81 on the substantially outer side of the cross member 65 of the rear frame 61.

Thus, with respect to the rear frame 61, rear floor cross member 72, and rear frame cross member 65, the trailing arm 1 is attached to the pivot point E, and the first to third lateral links 21, 31, and 41 are attached to the pivot points F. , G, H, and the damper 51 is connected and supported to the wheel house 81 at the connection point I, respectively.

Incidentally, a fuel tank 91 is arranged in the space below the rear part of the rear floor 71 and in front of the rear frame cross member 65, and the pivot point F of the first lateral link 21 on the vehicle body side is connected to the fuel tank 9.
1, and the third lateral link 41
A pivot point H on the vehicle body side is located behind the fuel tank 91, and a pivot point G on the vehicle body side of the second lateral link 31 is located above the fuel tank 91.

As described above, in particular, the trailing arm 1 is formed with the extension part 5 that projects forward from the pivot point E on the vehicle body side, and the first lateral link 21 is formed on the front extension part 5.
Since the first lateral link 21 is connected to the intermediate portion of the arm 1, the first lateral link 21 is closer to the pivot point E of the arm 1 than when connected to the intermediate portion of the arm 1, so the link length only needs to be relatively short as in the embodiment.

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

And the pivot point E of the trailing arm 1 on the vehicle body side
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 it acts on the grounding point of the tire 17 of the wheel 16. Toe rigidity relative to the side force can be maintained sufficiently higher than before.

(Effects of the Invention) As described above, according to the present invention, a trailing arm whose front end side is pivotally connected to the vehicle body, whose rear end side rotatably supports a wheel, and which is arranged in the longitudinal direction of the vehicle body;
It consists of a plurality of lateral links movably connected to the vehicle body at one end and the trailing arm at the other end, arranged in the lateral direction of the vehicle body, and one of the plurality of lateral links is arranged at the rear end side of the trailing arm. In the rear suspension of a vehicle installed in the vehicle, an extension part is formed on the front end side of the trailing arm to protrude forward from the vehicle body side pivot part, and another one of the plurality of lateral links is connected to the extension part. Therefore, the link length can be made somewhat shorter than when this single lateral link is connected to the intermediate part of the trailing arm, and there is no lateral link below the pivot point on the vehicle body side of the trailing arm. This allows us to increase the minimum ground clearance, and by connecting the lateral link forward of the pivot point on the vehicle body side of the trailing arm, the span between this link and the lateral link on the rear end of the trailing arm is larger than before. Since it can be removed, toe rigidity can be maintained at a high level.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the rear suspension, Figure 2 is a perspective view of the rear suspension.
4 are a plan view, a side view, and a rear view, FIG. 5 is a plan view showing rear vehicle body components, and FIGS. 6 and 7 are a side view and a rear view. In addition, in the drawing, 1 is a trailing arm, 5 is a front extension part, 15 is an axle, 16 is a wheel, 21,
31 and 41 are lateral links, and 51 is a damper.

Claims (1)

[Scope of Claims] 1. 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, with one end attached to the vehicle body and the other end attached to the trailing arm. In a vehicle rear suspension comprising a plurality of movably connected lateral links disposed in the lateral direction of the vehicle body, and one of the plurality of lateral links is disposed at the rear end side of a trailing arm, a trailing A rear suspension for a vehicle, characterized in that an extension part is formed on the front end side of the arm and projects forward from the vehicle body side pivot part, and another one of the plurality of lateral links is connected to the extension part. .