JPS6127287Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a torsion bar type suspension.

First, the conventional example will be explained with reference to FIGS. 1 and 2. In the figures, reference numeral 2 is a wheel, 4 and 6 are lower arms and upper arms that support the wheel 2, respectively, and 8 is a lower arm 4 with one end rotating. 10 is an anchor arm fixed to the other end of the torsion bar 8, and 12 is an anchor bolt that fixes the anchor arm 10 to the vehicle body member 14 and restricts rotation of the anchor arm. However, the anchor arm 10 is configured to be rigid not only in its rotating direction but also in the axial direction of the torsion bar 8, and the force acting on the wheel 2 in the longitudinal direction of the vehicle body is transmitted to the anchor arm 10 via the lower arm 4 and the torsion bar 8. Therefore, the lower arm 4 is equipped with a rubber button 4 for the purpose of improving riding comfort.
Despite being supported by a vehicle body member (not shown) via a and 4b, there was a problem in that the riding comfort was not excellent.

The present invention was devised in view of the above, and one end is unrotatably connected to the suspension arm, and the other end is unrotatably connected to the anchor arm, which engages with the vehicle body frame and restricts rotation. In the one having a torsion bar, the anchor arm is
The relative displacement along the axial direction of the torsion bar between the connection point of the anchor arm to the torsion bar and the engagement point with the vehicle body frame is absorbed by the elastic deformation of the anchor arm itself, and the anchor arm is sufficiently rigid in the rotation direction. The gist of the present invention is a torsion bar type suspension characterized in that it is formed of a leaf spring material arranged perpendicularly to the rotational axis of the torsion bar so as to obtain the following.

According to the present invention, the force acting on the wheel in the direction of the rotation axis of the suspension arm is transmitted to the anchor arm via the suspension arm and the torsion bar, but is absorbed by the deformation of the anchor arm. It is possible to allow a desired displacement of , and the above-mentioned problems of the conventional device can be solved.

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 3 and 4. Note that in the drawings, parts that are substantially the same as those of the above-mentioned conventional device are designated by the same reference numerals as used above, and detailed description thereof will be omitted.

In this embodiment, the anchor arm 20 welded to the torsion bar 8 is formed of a plate spring material so as to be rigid in the direction of rotation and soft in the direction of the rotation axis, and is connected to the anchor arm 20 and attached to the vehicle body member. Its rotation is regulated by an anchor bolt 22 passing through 14. Note that the anchor arm 20 absorbs relative displacement along the axial direction of the torsion bar 8 between the connection point of the anchor arm 20 with the torsion bar 8 and the engagement point with the vehicle body member 14 by elastic deformation of the anchor arm 8 itself. In addition, it is arranged to be orthogonal to the rotation axis of the torsion bar 8 so as to obtain sufficient rigidity in the rotation direction. Further, a rubber bush 24 is fitted to the torsion bar 8 so that the torsion bar 8 and the vehicle body member 14 do not come into direct contact when the torsion bar 8 is displaced in its axial direction.

According to the above configuration, the force acting on the wheel 2 in the longitudinal direction is transmitted to the anchor arm 20 via the lower arm 4 and the torsion bar 8, but it is absorbed by the deformation of the anchor arm 20, so the rubber bush 4a of the lower arm 4 and 4b can be allowed to move as desired, and the above-mentioned problems of the conventional device can be solved.

Further, since the torsion bar 8 contacts the vehicle body member 14 via the rubber bush 24, the rubber bush 24 can absorb the vertical force acting on the torsion bar 8, and furthermore, the axial force is applied to the rubber bush 24 as a shearing force. So,
The displacement of the torsion bar 8 is hardly hindered.

In addition, in the above embodiment, the anchor arm 20
is welded to the torsion bar 8, but it is also possible to weld a boss to the anchor arm 20 and spline connect the boss to the torsion bar 8.

[Brief explanation of the drawing]

Figure 1 is a bottom view showing the conventional structure, and Figure 2 is the bottom view of the conventional structure.
3 is a bottom view showing an embodiment of the present invention, and FIG. 4 is a view taken along the arrows in FIG. 3. 2...Wheel, 6...Lower arm, 8...Torsion bar, 10, 20...Anchor arm, 14...
...Vehicle body member.

Claims (1)

[Scope of utility model registration request] A torsion bar having one end unrotatably connected to the suspension arm and the other end unrotatably connected to an anchor arm whose rotation is restricted by engaging with the vehicle body frame, wherein the anchor arm has: The relative displacement along the axial direction of the torsion bar between the connection point of the anchor arm to the torsion bar and the engagement point with the vehicle body frame is absorbed by the elastic deformation of the anchor arm itself, and the anchor arm is sufficiently rigid in the rotation direction. A torsion bar type suspension, characterized in that it is formed of a leaf spring material arranged perpendicularly to the rotational axis of the torsion bar so as to obtain the following.