JPH0444414Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a vehicle height adjustment device for a vehicle employing a torsion bar spring type suspension.

(Prior Art) Conventionally, this type of vehicle height adjustment device includes a torsion bar spring, one end of which is fixed to a lower suspension arm, as disclosed in Japanese Utility Model Application Publication No. 59-151713, for example. There is a structure in which an anchor arm is fixed at the end and the operating force of the power cylinder is directly applied to the tip of the anchor arm. In this configuration, the torsion amount of the torsion bar spring is increased or decreased by operating the power cylinder, and the vehicle height is adjusted by rotating the lower suspension arm accordingly.

(Problems to be solved by the invention) In the conventional vehicle height adjustment device described above, the operating force of the power cylinder is applied directly to the tip of the anchor arm, so it is difficult to install the anchor arm. Therefore, the installation location of the power cylinder has to be determined, and if it is not possible to secure installation space for the power cylinder due to the relationship with the vehicle frame or other chassis parts, the installation location of the anchor arm mentioned above must also be changed. The problem arises that it must be done.

(Means for Solving the Problems) In order to solve the above problems, the vehicle height adjustment device for a torsion bar spring type suspension according to the present invention is constructed as follows.

In other words, a torsion bar spring is connected at one end to the suspension arm, an anchor arm is connected to the other end of the torsion bar spring, and the torsion bar spring is rotatably supported with respect to the vehicle frame, with a part of the anchor arm connected to the anchor bolt. Therefore, an idle lever coupled to the anchor arm, and a power cylinder fixed to the frame to apply rotational force to the idle lever and torsion force to the torsion bar spring through the anchor bolt and the anchor arm. We are prepared.

(Function) According to the above configuration, the anchor arm 5 rotates upward through the idle lever 6 and the anchor bolt 8 due to the operation of the power cylinder 11.
As a result, the amount of torsion applied to the torsion bar spring 4 increases or decreases, and the vehicle height of the vehicle is adjusted as the Atsupah suspension arm 1 rotates. In this way, the power cylinder 11 and the anchor arm 5
By interposing a predetermined interlocking member between the anchor arm 5 and the
This means that the installation location of the power cylinder 11 can be freely selected.

(Example) Hereinafter, an example of the present invention will be specifically described based on the drawings.

In Figure 1, which is a perspective view showing an overview of a double-width bone type torsion bar spring suspension equipped with a vehicle height adjustment device,
As is generally well known, this double-width bone type suspension includes an upper suspension arm 1, a lower suspension arm 2, and a knuckle 3 supported by the tips of these arms. One end of a torsion bar spring 4 is connected to the base end of the Atsupa suspension arm 1 by means such as serration fitting, and this torsion bar spring 4
An anchor arm 5 is similarly connected to the other end by means such as serration fitting.

As is clear from FIG. 2, near the side where the anchor arm 5 is installed, the base end of the idle lever 6 is rotated in the vertical direction in the drawing by the shaft 7 relative to the vehicle frame 13. It is movably mounted. Moreover, a substantially intermediate portion of the idle lever 6 and the tip of the anchor arm 5 are connected to each other by an anchor bolt 8 so as to be interlocked with each other. Incidentally, swivels 9 and 10 are interposed between the upper surface of the idle lever 6 and the head of the anchor bolt 8, and between the lower surface of the anchor arm 5 and the nut 12 screwed into the anchor bolt 8, respectively.

Further, a power cylinder 11 using a hydraulic cylinder or the like is fixed to a part of the frame 13, and the tip of the piston rod 11a of the power cylinder 11 is configured to apply rotational force to the tip of the idle lever 6. are in contact. Therefore, when hydraulic pressure is applied to the power cylinder 11 through a hydraulic circuit (not shown), the piston rod 11a protrudes upward in the drawing.
Along with this, the anchor arm 5 is moved to the second position through the movement of the idle lever 6 and the anchor bolt 8.
It rotates upward in the figure. In other words, the operating force of the power cylinder 11 is transmitted to the anchor arm 5 through predetermined interlocking members such as the idle lever 6 and the anchor bolt 8.

In the vehicle height adjustment device configured as above,
A load generated by the weight of the vehicle acts on the above-mentioned Atsupah suspension arm 1 in the direction of arrow A in FIG. On the other hand, in order to cope with this, the torsion bar spring 4 is provided with an anchor arm 5.
torsion in the direction of arrow B in FIG. 1, and the anchor bolt 8 is used for positioning with the loads in the directions of both arrows A and B balanced. As a result, the Atsupa suspension arm 1 is held at the predetermined height shown in the figure. Therefore, hydraulic pressure or the like acts on the power cylinder 11,
When the piston rod 11a moves upward, the anchor arm 5 rotates upward through the idle lever 6 and the anchor bolt 8 as described above. As a result, a torsion force is applied to the torsion bar spring 4 in the direction of arrow B in FIG. Since the load is balanced with the load, the torsion amount of the torsion bar spring 4 itself does not change, and as a result, the Atsupa suspension arm 1 rotates downward in the drawing (in the opposite direction to arrow A). . Accordingly, the vehicle height of the vehicle is adjusted to be higher than before the adjustment.

In this way, the operating force of the power cylinder 11 against the anchor arm 5 is transferred to the idle lever 6.
By using the lever ratio of the idle lever 6, it is possible to increase the operating force of the power cylinder and transmit it to the anchor arm 5 by using the lever ratio of the idle lever 6. . As a result, the operating force of the power cylinder 11 can be set small, and the power cylinder 11 can be made smaller. Furthermore, by interposing the idle lever 6 and the anchor bolt 8 between the power cylinder 11 and the anchor arm 5, the power cylinder 11 can be installed freely without worrying about where the anchor arm 5 is installed. can be selected.

(Effects of the invention) As described above, the present invention allows you to freely select the installation location of the power cylinder without being particular about the installation location of the anchor arm. This is effective in cases where it is difficult to secure installation space for the power cylinder near the power cylinder.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is an external perspective view showing a vehicle height adjustment device for a torsion bar spring type suspension, and Fig. 2 is a front view showing the main parts of Fig. 1. be. 1...Atsupa suspension arm, 4...Torsion bar spring, 5...Anchor arm,
6...Idle lever, 8...Anchor bolt, 1
1...Power cylinder.

Claims (1)

[Scope of utility model registration request] A torsion bar spring is connected at one end to the suspension arm, and an anchor arm is connected to the other end of the torsion bar spring. The torsion bar spring is rotatably supported with respect to the vehicle frame, and a portion of the spring is connected to the anchor bolt. an idle lever coupled to the anchor arm; and a power cylinder fixed to the frame to apply rotational force to the idle lever and torsion force to the torsion bar spring through the anchor bolt and the anchor arm. Vehicle height adjustment device for torsion bar spring suspension.