JPS6212473A - Steering damper - Google Patents

Abstract

PURPOSE:To increase the fitting freedom to a car body and facilitate the fitting of a fairing by storing a rotary rotor in housings and providing a damper directly below a steering and coaxially with a steering stem. CONSTITUTION:A damper constituted of housings 6, 7, a rotary rotor 9, and a valve 11 is provided directly below a steering and coaxially with a steering stem 1. The rotor 9 forms multiple oil chambers S1-S4 together with the housing 7, and they are communicated to each other via oil paths 10a-10d provided on the rotor 9. The valve 11 is rotated by the operation of a step motor 16 in response to a car speed or the throttle opening to close or open the oil paths 10a-10d, thereby oil chambers are cut off or communicated to change a damping force. According to this constitution, the fitting freedom to a car body is increased, and the fitting of a fairing can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a steering damper. More specifically, it relates to a steering damper that is installed directly below the steering stem and on the same axis as the steering stem, and has a rotary set structure (prior technology). A steering damper may be provided.

Taking a motorcycle as an example, this steering damper is as shown in Fig. 7, and the end of the main body (51a) of the damper (51), which is a set of cylinders containing a working medium such as oil, is attached to a bracket (54). Down pipe (52) through
In addition, the end of the damper load 2 (51b) which is slidably fitted to the main body (51a) is attached to the bottom bridge (53).
The bottom bridge (53
) and the down pipe (52), a damping force is generated by the damper (51) to restrict rotation of the handle.

(Problems to be Solved by the Invention) However, when installing the steering damper (51) of such a set of cylinders in the above position, it is difficult to install it because the space in the above place is limited, and the steering damper (51) of the cylinder set is difficult to install due to the limited space. This makes installation even more difficult. Also, if the steering damper (51) is installed in the above location, the steering damper (51)
) protrudes outward from the negative side of the down pipe (52), causing problems such as difficulty in mounting the fairing.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention is provided at a location directly below and coaxially with the steering stem and a rotor that rotates in conjunction with the steering stem. A steering damper is composed of a housing that accommodates a rotor, a plurality of chambers formed between the rotor and the housing and divided by the rotor, and a flow path that communicates each chamber, and the damper can be easily attached to the vehicle body. so that it can be installed on.

(Embodiment) A preferred embodiment of the present invention will be described below based on the accompanying drawings. In this embodiment, a case will be described in which a steering damper is attached to a motorcycle.

FIG. 1 is a longitudinal side view of the steering damper according to the present invention, and the cross-sectional portion shows the cross section taken along the line A-A in FIG. Omitted.

Steering stem (1) Head tube fitted around the outer periphery (2) Below is a down pipe (3) pointing downwards on the vehicle body side
The upper housing (6) is attached via the bracket (5), (5) fixed to the down pipe (3), and the upper housing (6) is attached to the lower part of the upper housing (6). Lower housing (7) with bolts (8)
The center of the upper housing (6) and lower housing (7) is the steering stem (1).
It is located directly below the steering stem (1) and coaxially with the upper housing (6) and lower housing (6).
7) has a large degree of freedom in mounting and can be installed in a location advantageous in terms of space.

Also, upper housing (6) and lower housing (7)
A space (S) is formed between them, and oil as a working medium is sealed in this space (S). The lower part (9a) of the rotor (3) whose upper part is fixed to the steering stem (1) via a spline (20) faces this space (S), and as shown in FIG. A cylindrical portion (9b) and bases 7 (
9c), (9c) and the cylindrical part (9b) external station no vane (
9c), and protrusions (9d) and (i3d) formed at positions shifted by 90 degrees from (9c), respectively. In addition, protrusions (7a), (
7a) is formed and the vane (9c) of the rotor (9)
, (9c) and the protrusion (9d) of the rotor (9), (1
3d) and the protrusion (7a) of the lower housing (7), (
7a) creates a chamber (31), (S2) in the space (S)
, (S3), (S4) are defined, and the rotor (
9) protrusions (9d), (9d) and the lower housing (
Very small gaps (d+) and (d2) are formed by the protrusions (7a) and (7a) of 7). Also, 1 cylindrical part (
9b), each vane (9c), (9c) and each protrusion (9d
), (ld) are provided with oil passages (lrla) and (10b), respectively.
, (10c), (10d) are formed, and these oil passages (
10a) , (10b) , (toc) , (IQd)
The inside and outside of the cylindrical portion (9b) are communicated with each other. The inside of the cylindrical part (8b) has a pull having a length approximately equal to the inner diameter of the cylindrical part (9b).
is defined.

Further, a shaft portion (11a) provided at the bottom of the valve (11) protrudes downward from the lower housing (7), and a sector gear (13) is fixed to this shaft portion (lla) via a lug (12).

On the other hand, a step motor (1B) is fixed to a bracket (14) formed toward the rear of the vehicle body from the lower housing (7) via bolts (15), and the rotation shaft ( A sector gear (17) is fixed to the valve shaft (
lla) meshes with the teeth (13a) of the sector gear (13). This step motor (18) is operated according to the vehicle speed by a vehicle speed sensor (not shown).

As described above, the rotary damper of the present invention is installed at the lower end of the steering stem (1), that is, at the lower end of the steering stem (1).
It is located directly below the steering wheel and on the same axis as the steering shaft (1), and its structure is a rotary set.

Explain.

First, in the low speed range, the valve (11) is in the position shown in Fig. 3, and the chamber (S+)- is connected to the oil passage (10a) and the chamber (Ss).
, the chamber (S4) communicates with the chamber (S2) via the oil passage (10b), and the chamber (S3) via the oil passage (10d), the chamber (Ss), and the oil passage (10c), respectively. For this reason, even if the steering wheel is turned to the left, the oil in the chambers (Ss and (S3) can flow out to the chambers (S2) and (S4), respectively, so the damping force is low, and even if the steering wheel is turned to the left, When the rotor (9) is rotated, a gap (d) is created as shown in Figure 6.
θ, (d2) expands and the damping force becomes even lower. Next, when the vehicle speed increases, the speed sensor detects this increase in vehicle speed, and the step motor (16) is activated, which rotates the rotating shaft (1B) and passes the valve ( 11) rotates and enters the medium speed range, the valve (11) rotates to the position shown in FIG. In this position the valve (11) has an oil passage (10a) at its end;
(10c) is closed, and the chamber (Sl) and chamber (S2) are separated by the gap (d
l), and the chamber (S3) and chamber (S4) are separated by a gap (d
2) is cut off leaving only 2). Therefore, even if the handle tries to rotate due to disturbance or the like, a damping force is generated because each chamber is blocked, and this makes it possible to restrict the rotation of the handle.

Next, when the vehicle speed is further increased, the fifth valve (11) is activated via the vehicle speed sensor and step motor (16) in the same manner as described above.
The chamber (S+) is rotated to the position shown in the figure, and the oil passage (10a
), chamber (Ss), chamber (S4) via oil passage (10d)
In addition, the chamber (S2) has an oil passage (10b) and a chamber (S s).
, and communicate with the chamber (S3) via oil passages (tOC).

Therefore, the damping force decreases as in the low speed range.

In this embodiment, the case where the steering damper is attached to a motorcycle has been described, but the present invention is of course not limited to this.

(Effects of the Invention) As described above, according to the present invention, since the steering damper is provided directly below the steering stem and on the same axis as the steering stem, this previously dead space can be used, which is advantageous in terms of space. In addition, there is a large degree of freedom in installation, and unlike conventional cylinder pipe steering dampers, the damper itself does not move laterally depending on the steering angle, so it is easy to install on the vehicle body. Unlike conventional steering dampers, the steering damper of the present invention does not protrude to the outside of one side of the frame pipe, so it has many advantages such as ease of mounting of a fuel ring.

[Brief explanation of drawings]

Figure m1 is a longitudinal sectional side view of the steering damper according to the present invention, Figure 2 is a view in the direction of the ■ arrow in Figure 1, and Figure 3. 4, 5, and 6 are cross-sectional views of the housing to show the movements of the valve and rotor, and FIG. 7 is a conventional example. In the drawing, (1) is a steering stem, and (6) is a steering stem. (7) is a housing, (8) is a rotor, and (10a). (10b), (loc), (10d) are flow paths, (S+)
thru (Ss) are chambers. Figure 7 Figure 3 Figure 5 Figure 4 Figure 6

Claims (1)

[Scope of Claims] A rotor that rotates in conjunction with a steering stem; a housing that is provided directly below the steering stem and coaxially with the steering stem and houses the rotor; and between the rotor and the housing. What is claimed is: 1. A steering damper comprising: a plurality of chambers divided by a rotor; and a flow path communicating the chambers.