JPS63306993A - Steering safety device for prime mover car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a steering stabilization device for stabilizing the steering wheel of a motor vehicle, particularly a two-wheeled, three-wheeled or four-wheeled motorized vehicle used on rough terrain.

(Prior Art) In vehicles used on rough terrain, obstacles or terrain often apply impact to the front wheels, and this impact tends to generate an impact force in the turning direction on the steering wheel, and this turning 11w force is ineffective for the driver. It gives a pleasurable feeling, and at the same time, the steering wheel is removed and the steering action is obstructed.

A device in which one hydraulic damper is connected to the steering mechanism in order to alleviate this turning impact force is known from Japanese Patent Application Laid-open No. 61-IS9S78. This device uses a screw mechanism to replace the rotation of the steering shaft with the linear movement of a hydraulic piston, and uses this reciprocating movement to cause oil to flow through a throttle passage! It is meant to absorb the I impact force.

(Problems to be Solved by the Invention) The above-mentioned conventional device has a screw, a piston, and a throttle passage, so it has a complicated structure, has many types of parts, is expensive, and has a large weight. Furthermore, due to long-term use, the sealing performance of the piston deteriorates, the screws wear, etc., so it is assumed that performance such as cushioning performance and responsiveness will deteriorate.

(Means for Solving the Problem) The present invention damps the impact during rotational motion without converting it into linear motion, and the means for this invention is to attenuate the impact during rotational motion without converting it into linear motion. In a steering stabilization system for a motor vehicle, the front wheel turning assembly is provided with at least one steerable front wheel supporting a steering shaft of a motor vehicle, and having a viscous damper for turning impact force.
A cylindrical sealed oil chamber surrounding the steering shaft is formed inside the steering casing, and a stationary disk spline-coupled to the inner surface of the oil chamber and a movable disk spline-coupled to the steering shaft are alternately inserted into the sealed oil chamber. A viscous damper is formed by stacking them one on top of the other and sealing a viscous fluid in the sealed oil chamber.

(Function) Since the above means is provided, when a turning force is applied to the front wheel turning assembly, viscous resistance is generated between the movable disk and the stationary disk due to the viscous fluid, thereby alleviating the impact 5j1. The greater the impact force, the greater the viscous resistance.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 1, (1) is the front frame of the motor vehicle;
A steering casing (2) is integrally welded to its front end,
Engine E is installed below. The steering casing (2) has a cylindrical shape and steers the front wheel swivel assembly (5) by means of upper and lower bearings 131, +4).

It supports the shaft (6).

The assembly (5) includes a top bridge (7), a bottom bridge (8) fixed to the upper and lower ends of the steering shaft (6), and a front wheel fork (9) fixed to these bridges (7) and (8). A suitable handle is fixed to a top bridge (7) consisting of a front wheel αG and a front wheel αG supported by the fork.

The steering casing (2) and the steering shaft (6) form part of the viscous damper αυ, and the steering shaft (2)
) has a cylindrical sealed oil chamber α shown in Figure 2 and Figure S.
2 is provided, and an internal spline a is provided on the inner surface of the damping chamber α2.
3 is engraved, and the steering shaft (6) is engraved with an externally toothed spline α.

Each spline (131, (141) is spline-coupled with a damping disk shown in FIG. e is engraved, and the internal spline (combined with 13, shown in the same figure) of the steering casing (2) is attached to the movable disc αD.
A spline is engraved in the center hole to indicate the steering shaft (
6) is connected to the external spline I14. Each disc (
Is (AT) are stacked alternately, and small holes Ql and ■ of different shapes are bored through the plate, and the steering shaft (
5) is a retaining ring 01) that limits the vertical movement of the disc group.
, @ are locked.

Above and below the disk group, sealing ring openings like oil seals are provided at the upper and lower ends of the oil chamber α2, c! 7 is fitted, and the inner periphery of the ring is fitted to the steering shaft to form a sealed space. A viscous fluid such as silicone oil is sealed inside this space and enters between the stationary disk (IS) and the movable disk η, forming a viscous damper.
9, ■ is an opening for increasing the viscous resistance between each disk by the shear resistance pressure of the fluid. Steering casing (2)
A seal 4 for the bearing (4) is attached to the lower end of the bearing (4).

With the above configuration, when the steering wheel is operated while driving, the front wheel turning assembly (5) moves around the steering shaft (16).
). At this time, the moving disk (17) slides with respect to the stationary disk, but since the relative speed is small, the viscous resistance due to the viscous fluid is small and does not give a sense of resistance to the driver. However, when the front wheels collide with an obstacle and a sudden rotational force is applied that causes the steering wheel to be taken off, both discs (1!19, Ren?)
Due to the large relative speed of Do not cause any discomfort.

The illustrated steering shaft (6) has a tapered shape and applies pressure to keep the distance between the discs U9 constant, but the distance between the discs is maintained by using a shaft with the same diameter and placing a spacer between the discs. It can be kept.

(Effects of the Invention) Since the present invention buffers the turning impact force by the viscous resistance of the viscous fluid acting between the discs, the structure is simple and there are few types of parts, so it can be manufactured at extremely low cost. can. Moreover, since the discs do not come into direct contact with each other, there is no wear, and the relative movement in the spline portion is extremely small, so no wear occurs here either, so the shock absorbing capacity, responsiveness, etc. do not change even after long-term use.

Furthermore, since the structure is simple and there are no parts that require complex movement, there is no risk of failure.

[Brief explanation of the drawing]

FIG. 1 is a side view of a frame of a vehicle embodying the present invention, FIG. 2 is a longitudinal sectional view of the main part, FIG. 3 is a vertical sectional view, and FIG. 4 is a plan view of a disc. (2)... Steering casing (5)... Front wheel turning assembly (6)... Steering shaft 11υ... Viscous damper (17J... Sealed oil chamber (IS... Fixed disk 0 ″r)... Movable disc patent applicant: Honda Motor Co., Ltd. Honda Engineering Co., Ltd.
・) Agent Kin Kitamura −)
-j 2 people Figure 3

Claims (1)

[Scope of Claims] 1. A steering shaft of a front wheel turning assembly is supported by a steering casing fixed to the frame of the vehicle, and the front wheel turning assembly is provided with at least one steerable front wheel and has a viscosity against turning impact force. In a steering stabilization device for a motor vehicle equipped with a damper, a cylindrical sealed oil chamber surrounding a steering shaft is formed inside a steering casing, and a stationary disk is spline-coupled to the inner surface of the oil chamber, and a stationary disk is spline-coupled to the steering shaft. A steering and stabilizing device for a motor vehicle, characterized in that movable discs are stacked alternately in a sealed oil chamber, and a viscous fluid is sealed in the sealed oil chamber to form a viscous damper. 2. The steering and stabilizing device for a motor vehicle according to claim 1, wherein the viscous fluid is made of silicone oil.