JPS5835524Y2 - suspension - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a trailing arm type rear suspension.

A rear suspension in which the wheels are attached to the vehicle body by a trailing arm is shown in FIGS. 1a, b, and c.

In the figure, a trailing arm 01 is formed by welding together an upper arm 02 and a lower arm 03 that are press-formed into a semicircular cross section.

One end of the trailing arm 01 is pivoted to the vehicle body, and a bracket 04 is welded to the other end.

The bracket 04 has a U-shaped cross section, has a coil spring seat 05 formed at one end, and has a spindle 05 welded to the U-shaped portion at the other end.

However, in the above structure, the upper arm .02 and the lower arm 03, the both arms 02゜03 and the bracket 04, and the bracket .04 and the spindle 0
6 are welded together, which requires a large number of welding man-hours, and the number of parts, 4, is large, resulting in a large number of assembly and manufacturing man-hours.

The purpose of the present invention is to provide a trailing arm type rear suspension structure that eliminates the above-mentioned drawbacks, and its characteristics are that the upper arm and the lower arm are welded together to form a closed cross section; In a rear suspension in which at least the upper arm has a tray link arm having a U-shaped cross section that opens toward the lower arm, a mounting portion for mounting a spindle is provided on a side surface of the rear end of the upper arm, and
The coil spring receiver integrated with the lower arm has a seat by making the rear end of the lower arm protrude more inwardly than the closed cross section in the direction of the vehicle interior, and the seat of the coil spring receiver is approximately the same as the spindle when viewed from above. The spindle is located on an extension of the axis of the spindle and below the axis of the spindle in side view.

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

Fig. 2 is a plan view (not showing the trailing arm) of one embodiment of the present invention, Fig. 3 is a side view thereof, and H of Fig. 2 in Fig. 4.
5 is a sectional view taken along the line C-C in FIG. 2.

In the figure, 1 is an upper arm and 2 is a lower arm. The upper arm 1 has a U-shaped cross section that opens toward the lower arm 2, and the lower arm 2 also has a U-shaped cross section that opens toward the upper arm 1. 1 and 2 are welded together to form a trailing arm having a closed cross section.

The front end of the trailing arm is fixed to a shaft 6 that is pivotally supported on the vehicle body.

A mounting portion corresponding to the corner-shaped portion of the spindle 4 on which a wheel is mounted is provided on the side surface of the rear end of the upper arm 1.

Further, a reinforcing plate 3 is inserted and fixed inside the portion of the upper arm 1 corresponding to the above-mentioned attachment portion, and the closed section formed by the upper arm 1 and the lower arm 2 is divided into upper and lower portions by the reinforcing plate 3. Improves strength.

To attach the spindle 4, the corner end face of the spindle 4 is brought into contact with the side surface of the upper arm 1 (which has the rectangular closed cross section formed above), and the lower end a and both side edges are welded.

The coil spring receiver is provided with a seat 7 by causing the rear end portion of the lower arm 2 to protrude more inwardly than the closed cross-section portion in the vehicle interior direction.

The seat 7 of the coil spring receiver is located approximately on an extension of the axis of the spindle 4 in a plan view and below the axis of the spindle 4 in a side view.

Incidentally, reference numeral 5 designates an absorber bracket to which the other end of a shock absorber (not shown) whose one end is connected to the passenger compartment side is connected.

According to the structure as described above, the following effects can be obtained.

(1) The bracket of the conventional device can be omitted, reducing the number of parts.

(2) The arm and spindle are connected only by welding the lower end and both side edges, making welding work easier and improving welding reliability.

(3) Since the seat 7 of the coil spring receiver is located almost on the extension of the axis of the spindle 4 in plan view, the spring reaction force input from the seat 7 of the coil spring receiver is hardly applied as a bending moment to the trailing edge. The coil spring receiver does not require as much strength as the seat 7, and as a result, the seat 7 and the receiver integrated with the lower arm 2 can withstand sufficient strength.

(4) Since the seat 7 of the coil spring receiver is located below the axis of the spindle 4 when viewed from the side, the distance between the seat 7 and the lower surface of the podium can be set large, which allows the upper end of the coil spring to be The amount of thrust of the receiving part into the interior of the vehicle can be greatly reduced, improving the comfort inside the vehicle.

(5) Although the height of the seat 7 of the coil spring bearing is lowered below the axis of the spindle 4 in order to obtain the effect of item (4) above, the bearing has a height of the seat 7 that is almost an extension of the axis of the spindle 4. Since the seat is located at 1, the problem of interference of the catch seat 7 with a protrusion on the road surface when the vehicle rides over the protrusion can be minimized, and the substantial minimum height above the ground can be kept large.

(6) Since the seat 7 of the lower coil spring receiver is formed integrally with the lower arm 2, the receiver can be easily formed integrally with the lower arm 2 without deep drawing the seat 7.

[Brief explanation of the drawing]

Figure 1a is a plan view showing the main parts of a conventional trailing arm type rear suspension, and Figure 1 is A-A in Figure 1a.
1C is a sectional view taken along the arrow B in FIG. 2 is a sectional view taken along line B-B in FIG. 2, and FIG. 5 is a sectional view taken along line C-C in FIG. 2. 1... Upper arm, 2... Lower arm, 3... Reinforcement plate, 4... Spindle, 5... Abseaper bracket, 6...・・・・・・
・Shaft, 7...The coil spring receiver is the seat.

Claims (1)

[Scope of utility model registration request] In a rear suspension having a trailing arm formed to form a closed cross section by welding an upper arm and a lower arm to each other, at least the upper arm has a U-shaped cross section opened toward the lower arm, the rear end of the upper arm In addition to providing a mounting portion for attaching the spindle on the side surface of the lower arm, the rear end portion of the lower arm is made to protrude inward in the direction of the vehicle interior than the closed section portion, thereby providing a seat for the coil spring receiver integrated with the lower arm. The tossing suspension is characterized in that the seat of the coil spring receiver is located substantially on an extension of the axis of the spindle in plan view and below the axis of the spindle in side view.