JPS6127329Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering system vibration suppressing device, and more particularly to a device for suppressing steering system vibrations such as shimmy and flutter.

The friction of the steering system gradually decreases over time, and unpleasant vibrations such as shimmy may occur. In order to suppress the occurrence of shimmy, there are steering dampers that use liquid, but they are disadvantageous in terms of weight and cost.

The purpose of the present invention is to provide a simple vibration suppressing device that can obtain the same effect as a steering damper using liquid by only slightly changing the structure of the idler arm device, which is a component of the steering system. Furthermore, the present invention allows the frictional force of the steering system to be adjusted to any desired level, and
To always obtain stable frictional force.

For this reason, the steering system vibration suppression device according to the present invention uses an arm bracket fixed to the vehicle body,
A support shaft fixed to this arm bracket, an idler arm slidably supported on this support shaft and connected to a connecting rod of the steering system, a disk coaxially attached to the support shaft, and this disk. a brake plate that is rotatable integrally with the idler arm and movable in the axial direction with respect to the arm and holds a friction material on the opposing surface; Equipped with a pressing mechanism that presses the disc against the disc. It is preferable to use a coil spring as the pressing mechanism and to make the preload adjustable.

To explain the present invention with reference to the drawings, reference numeral 1 denotes an idler arm device that supports a connecting rod of a steering system, and its arm bracket 2 is fixed to a vehicle body frame (not shown).
The idler arm 3, which is swingably supported by the vehicle, has its free end connected to a connecting rod (not shown) of the steering system.

An L-shaped arm bracket 2 has a support shaft 4 fixed at one end to one leg with a nut 15. A sleeve 6 is rotatably supported on the support shaft 4 via a bearing piece 5. This sleeve 6 is formed integrally with the idler arm 3. A disk 7 is coaxially mounted on the support shaft 4, and a large diameter cylindrical portion 8 extends in the axial direction, surrounding the disk 7 coaxially from the sleeve 6. Opposed to the lower surface of the disk 7 is an annular brake plate 9 having a central hole through which the support shaft 4 loosely passes, with a radial protrusion 10 on its periphery inserted into an axial groove 11 on the inner circumferential surface of the cylindrical part 8. It is fitted and guided within the cylindrical part 8 so that it can only be moved in the axial direction. Annular brake plate 9
An annular friction material 12 is partially embedded and fixed to the upper surface of the disc 7, that is, the surface facing the disk 7. A coil spring 13 concentric with the support shaft 4 is in contact with the opposite or lower surface of the annular brake plate 9, and this spring 13 is supported at its lower end by a spring receiving plate 14 that fits loosely onto the support shaft 4. An external thread is cut at the end of the support shaft 4 protruding from the spring receiving plate 14, and an adjustment nut 15 is fitted onto the external thread. This nut 15' makes it possible to adjust the preload of the spring 13 and therefore the pressing force of the friction material 12 against the disc 7.

The rotational vibration of the idler arm 3 due to vibrations caused by shimmies and shimmy is caused by the frictional force between the disc 7 fixed to the arm bracket 2 and the friction material 12 of the brake plate 9 which rotates together with the arm 3. Therefore, unpleasant rotational vibrations of the steering wheel are suppressed. Thus, according to the present invention, by only making slight changes to the structure of the idler arm device 1, that is, by adding the structural parts 7 to 15, it is possible to obtain the same good vibration suppression effect as a damper using a liquid. Furthermore, these additional parts 7 to 15 are of simple construction and do not significantly increase weight or cost.

Furthermore, since the friction force of the friction material 12 can be easily adjusted using the adjustment nut 15, even if the friction force of other parts of the steering system changes over time, this change can be compensated for and a stable friction force can always be obtained. It has many excellent advantages, such as significantly improving steering safety.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the - line. DESCRIPTION OF SYMBOLS 1...Idler arm device, 2...Arm bracket, 3...Idler arm, 4...Support shaft, 6...Sleeve, 7...Disc, 8...Cylindrical part, 9...Brake plate, 1
2...Friction material, 13...Coil spring, 14...Press plate,
15'...adjustment nut.

Claims (1)

[Scope of utility model registration request] An arm bracket fixed to the vehicle body, a support shaft fixed to this arm bracket, an idler arm slidably supported on this support shaft and connected to a steering system connecting rod, and coaxially attached to the support shaft. a brake plate which is rotatable integrally with the idler arm and movable in the axial direction with respect to the arm and holds a friction material on the opposing surface; A vibration suppression device for a steering system, comprising a pressing mechanism that applies an axial force to press a friction material against a disc.