JPS63312286A - Steering gear in saddling type 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 (Field of Industrial Application) The present invention relates to a steering device mainly applied to a scooter-type saddle-ride vehicle.

(Prior art) Conventionally, according to Japanese Patent Application Laid-Open No. 81-38074, a sleeve is fixed to a down tube extending rearward and downward from a head pipe that pivots a handlebar shaft, and a front fork is attached to the sleeve on the upper fork shaft. A steering device is known in which the handle shaft and the fork shaft are pivotably connected to each other via a connecting member, and in this case, the connecting member is a laterally extending arm attached to the handle shaft. Generally, it consists of two parallel links connecting the fork shaft and a laterally extending arm attached to the fork shaft.

(Problems to be Solved by the Invention) By the way, in a vehicle where the handle shaft and fork shaft are integrated, the turning angle of the front wheels relative to the turning angle of the steering wheel, the so-called steering ratio, must be set to 1=1. In a vehicle where the handle shaft and fork shaft are arranged separately, the steering ratio is not necessarily limited to 1:1.

However, in the conventional system described above, a parallel link mechanism is formed by the arm of the handle shaft, the arm of the fork shaft, and two links, so the steering ratio is fixed at 1:1.
The degree of freedom in setting the steering ratio is lost, similar to when the handle shaft and fork shaft are directly connected.

In view of the above points, an object of the present invention is to provide a device that allows the user to freely set the steering ratio according to his or her preference.

(Means for Solving the Problems) In order to achieve the above object, the present invention fixes a sleeve to the down tube extending rearward and downward from the head pipe that pivots the handlebar shaft, and attaches the front fork to the upper side of the sleeve. The fork shaft is pivotably supported on the fork shaft, and the handle shaft and the fork shaft are connected so as to interlock with each other via a connecting member, wherein the connecting member is attached to the handle shaft and extends in one direction in the lateral direction. and an arm attached to the fork shaft and extending in one side in the lateral direction, each having an adjustable length, and the attachment position of the link with respect to at least one of the two arms is adjusted in the longitudinal direction of the arm. It is characterized by being freely adjustable.

(Function) Since the attachment position of the link to the arm can be adjusted in the longitudinal direction of the arm, the arm ratio of both the handle shaft and fork shaft can be set arbitrarily, and there is only one link. The steering ratio can be changed without causing any mechanical stress. In this case, if the attachment position of the link to the arm is changed, the neutral position of the handlebar and the neutral position of the front wheel will no longer match, but this can be overcome by adjusting the length of the link.

(Example) In the drawing, (1) shows a scooter type vehicle equipped with a footrest (2), and the vehicle (1) has a head pipe (4) that pivotally supports a handle shaft (3) extending downwardly from the rear. An extending down tube (5) is provided, a sleeve (6) is fixed to the down tube (5), and a front fork (7) is pivotally supported on the upper fork shaft (8). and attach the front wheel (9) to the front fork (7),
The handle shaft (3) and the fork shaft (8) are connected via a connecting member, and the front wheels (9) are steered in conjunction with the operation of the handle at the upper end of the handle shaft (3). I made it possible.

In the drawing, ('lv) indicates the leg shield on the front side of the footrest (2), and (1?) indicates the trunk placed above the leg shield a1.

Here, the connecting member is a length-adjustable member that connects the arm 0 attached to the handle shaft (3) and extending in one side in the lateral direction and the arm a@ attached to the fork shaft (8) and extending in one side in the lateral direction. The attachment position of the link aO to at least one arm (13G) of both arms (13GΦ) is set to the arm (13(IID
It is adjustable and movable in the longitudinal direction.

More specifically, in the embodiment, since the head pipe (4) and the sleeve (6) are not parallel, the link (
The IG is connected via each ball joint (151), and the ball joint (+51 mounting hole ae is connected to the arm aΦ of the fork shaft (8) in the longitudinal direction of the arm 114 as shown in FIG. 3). We opened multiple locations at regular intervals,
The mounting position of the link a2 with respect to the arm l'IΦ can be adjusted and moved in the longitudinal direction of the arm (IΦ), and a screw (10a) is provided in the link (10) so that the link aO
into the ball joint (19) of the fork shaft (8) and the nut sleeve (15a) of the fork shaft (8).
IG length: j3WJ was made freely. In the drawing (15b)
indicates a lock nut, and ■ indicates a lid that is removably fitted into the maintenance window σ opened in the bottom wall of the trunk.

In the embodiment, several mounting holes aO were formed in the arm (l@), but the invention is not limited to this. It is also possible to configure the mounting holes ('IO) with elongated holes extending in the longitudinal direction of the arm aΦ. be.

Next, to explain the operation of the embodiment, by moving the attachment position of the link ('IO) to the arm (IΦ in the longitudinal direction of the link (IO) from the state shown by the phantom line in FIG. 3 to the state shown by the solid line, the handle The arm ratio between the arm (13) of the shaft (3) and the arm aΦ of the fork shaft (8) changes, and therefore the steering ratio changes.

In this case, if you change the mounting position of link a■ to arm ('lΦ), the neutral position of the handlebar and the neutral position of the front wheel (9) will not match, but this is because This can be dealt with by changing the screwing depth for (15a).

(Effects of the Invention) As described above, according to the present invention, the steering ratio of the front wheels of the saddle-planting type vehicle can be changed according to the user's preference, and the connecting member can be configured with one link. This has the effect of reducing the space required for its arrangement without causing mechanical unreasonableness.

[Brief explanation of drawings]

FIG. 1 is a cutaway side view of the main parts of a scooter type vehicle equipped with an example of the device of the present invention, FIG. 2 is a front view cut away along the line ■-■,
Fig. 3 is an enlarged plan view of Fig. 1 with the line ■-■.
There is a sectional view taken along the line IV-IV in the figure. <3)...Handle shaft (4)...Head pipe (5)...Down tube <6)...Sleeve (7)...Front fork (8)...Fork shaft

Claims (1)

[Claims] A sleeve is fixed to a down tube extending rearward and downward from a head pipe that pivotally supports a handle shaft, a front fork is pivotally supported on the sleeve at an upper fork shaft, and the handle shaft and the fork shaft are connected via a connecting member. The length of the connecting member connecting the arm attached to the handle shaft and extending in one side in the lateral direction and the arm attached to the fork shaft extending in one side in the lateral direction is adjustable. 1. A steering device for a straddle-type vehicle, characterized in that the steering device comprises one link, and the attachment position of the link with respect to at least one of the two arms is adjustable in the longitudinal direction of the arm.