JPS6220759A - Stopper mechanism in steering gear of vehicle - Google Patents

Abstract

PURPOSE:To improve the feeling of rigidity in the maximum steering angle by regulating the pivotal limit of a steering wheel in the maximum steering angle with a stopper while constitutionally forming then some clearance between a knuckle and the stopper. CONSTITUTION:A steering wheel 27 is turned right for example to pivot a steering pivot arm 5 through a steering shaft 6, an arm 7 and a tie rod 8 clockwise in the drawing. Thus, the right side knuckle 12 is pulled by a tie rod 14 to pivot clockwise. And left and right front wheels are steered right by pivoting the left and right knuckles 12, 12 clockwise. Next, when a stopper 28 of the steering wheel 27 abuts against a stopper 29, stoppers 25, 26 are constituted not to abut against each other, forming some clearance S therebetween. As a result, the feeling of rigidity in the maximum steering angle can be improved while the pivoting of a steering ring more than necessary due to the external force can be regulated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a stopper mechanism for a steering device in which a handle and a knuckle are connected via a connecting mechanism including a rod.

(Prior art) Generally speaking, the steering system for heavy vehicles transmits the rotation of the steering wheel to the steering shaft, and the rotation of the steering shaft is transmitted to the knuckle via a link mechanism using tie rods, and the rotation of the knuckle is transmitted to the knuckle through a link mechanism using a tie rod. The steering wheels are steered by motion.

If the limits of rotation of the steering wheel and knuckles are not regulated, the steering wheel will turn more than necessary and may interfere with other parts, so a stopper is provided to limit the limits of these rotations. There is.

(Problems to be Solved by the Invention) As described above, if only the limits of rotation of the handle and the knuckle are restricted, the stopper may be provided on only one member.

However, 1. For example, if the rotation limit of only the knuckle is restricted by a stopper, when the knuckle contacts the stopper and then attempts to turn the handle, this force acts on the tie rod, etc., causing the tie rod to bend, resulting in a feeling of insufficient rigidity. Also, if only the rotation limit of the steering wheel is restricted by a stopper, if a steering force is applied to the steering wheels due to unevenness of the road surface after the steering wheel contacts the stopper,
The knuckle rotates, causing the tie rod to flex as described above.

Therefore, it is possible to provide a stopper on both the handle and the knuckle, but it is almost impossible to have the handle and knuckle contact their respective stoppers at the same time, considering the manufacturing and tolerances. If the tie rod is made to hit the stopper first, the force of turning the handle will cause the tie rod to bend and feel a lack of rigidity, as described above, and the above problem becomes more noticeable in saddle-riding type vehicles.

(Means for Solving the Problems) In order to solve the above problems, the present invention regulates the rotational limits of the steering wheel and the knuckles using a stopper, and at the maximum steering angle when the steering wheel contacts the stopper, the knuckles A slight gap is formed between the stopper and the stopper.

(Function) When the steering wheel is turned to reach the maximum steering angle, the steering wheel and the stopper first come into contact with each other, so the sense of rigidity at the maximum steering angle is improved.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

In the embodiment, a saddle riding type four-wheel buggy vehicle will be described as an example.

FIG. 1 is a cutaway plan view of essential parts of a steering device to which the stopper mechanism of the present invention is applied, and FIG. 2 is a sectional view taken along line A-A in FIG. 1. 2) is swingably attached, and the front end of this swing arm (2) supports an axle case (3), and a steering pivot arm is attached to the upper surface of the central part of this case (3) via a shaft (4). (5) is attached rotatably.

Further, a steering shaft (6) connected to a bar-shaped handle is arranged behind the steering pivot arm (5), and an arm (7) that rotates integrally with this steering shaft (6) and the steering pivot arm (
5) is connected to the arm portion (5a) by a tie rod (8).

On the other hand, knuckle holders (9) are fixed to both ends of the axle case (3) as shown in FIG. ) and (11), a knuckle (12) is rotatably attached in a substantially horizontal plane. This knuckle (12) has an arm part (13) formed at its upper part, and this arm part (13) and the steering pivot arm (5) are connected by a tie rod (14).
Furthermore, a front wheel (1), which is a steering wheel, is inserted into a cylindrical portion (15) projecting outward from the knuckle (12) via a bearing (1B).
The hub (18) of 7) is rotatably held.

By the way, the output shaft (19) (see Fig. 1), which is arranged approximately parallel to the swing arm (2), is connected to the drive gear (2).
0), is connected to an axle (23) via a driven gear (21) and a differential gear mechanism (22), and this axle (
23), the end of the knuckle holder (
8), and is connected to the shaft member (20) via a constant velocity joint within this knuckle holder (8), and this shaft member (24) is spline-fitted to the inner circumference of the hub (18). There is.

Further, a stopper (25) is provided on the lower surface of the knuckle holder (8) as shown in FIG. ), (2B) are formed.

FIG. 4 is a schematic diagram of a steering device to which the stopper mechanism according to the present invention is applied, in which the steering shaft (8) has its upper end fixed to the center of a bar-shaped handle (27). ) is fixed with a stopper (28), and a stopper (29) that comes into contact with this stopper (28) is fixed to the stopper (28).
) is fixed to the head pipe, etc.

Then, as mentioned above, the arm (7) fixed to the steering shaft (6) and the steering pivot arm (
5) is a tie rod (8), and the steering pivot arm (5) and left and right knuckles (12), (12) are connected by tie rods (14), (14), respectively, and the rotation limit of the handle (27) is a stopper. (28), (2
The rotational limit of the knuckle (12) is restricted by the contact of the stoppers (25) and (2B). In the present invention, in particular, when the stoppers (28) and (29) come into contact, the stoppers (25) and (28) do not come into contact with each other, and a slight gap (S) is formed between them. I'm trying to make it happen.

In the above, if the handle (27) is turned to the right, for example,
The steering pivot arm (5) rotates clockwise in the figure via the steering shaft (6), arm (7), and tie rod (8), and this rotation causes the right knuckle (12) to be pulled by the tie rod (10). the left knuckle (12) is connected to the tie rod (
14) and rotates clockwise. and,
By rotating the left and right knuckles (12), (12) clockwise, the left and right front wheels (17), (1?) are steered to the right.Also, when the steering wheel (27) is turned to the left The front wheels are steered to the left by the same effect.Also, when the maximum steering angle is given to the steering wheel (27),
7) When the -/pa (28) comes into contact with the stop 7/< (29), the stopper (2B) of the knuckle (12) comes into contact with the stopper (25) of the knuckle holder (θ). It's a little far away.

(Effects of the Invention) As explained above, according to the present invention, the rotation of the steering wheel is regulated by the stopper at the time of the maximum steering angle of the steering wheel, and at this point, the knuckle is not brought into contact with the stopper, and the stopper is not brought into contact with the knuckle. Since a slight gap is formed between them, the stiffness of steering when steering the vehicle with the maximum steering angle is greatly improved.

[Brief explanation of the drawing]

:fS1 is a plan view of a steering device to which the stopper mechanism according to the present invention is applied, FIG. 2 is a cross-sectional view taken along line A-A in FIG.
The figure is a bottom view showing the attachment of the knuckle holder and the knuckle, and FIG. 4 is a schematic diagram of the steering device. In addition, in the drawing, (5) is the steering pivot arm, (
6) is the steering shaft, (8), (14) are the tie rods, (9) is the knuckle holder, (12) is the knuckle, (17) is the steering wheel, (25), (2El), (
28) and (29) are the stoppers. Figure 3 Procedural amendment (voluntary) March 19, 1985

Claims (1)

[Claims] In a vehicle steering device in which the rotation of a steering wheel is transmitted to a knuckle via a rod, and the steering wheels are steered by the rotation of the knuckle, the rotation of the steering wheel and knuckle is controlled by contacting a stopper. The limit of movement is regulated,
A stopper mechanism for a vehicle steering device, characterized in that a gap is left between the knuckle and a stopper that limits the rotational limit of the knuckle when the handle is in contact with the stopper.