JPS60163779A - Steering gear for 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]

In the present invention, the four-wheel vehicle includes a vehicle such as a tricycle with two front wheels.
1 to the steering system. The present invention is particularly suitable as a steering device for a straddle-type vehicle for driving on rough terrain using low-pressure ties. For example, if two front wheels and two rear wheels are provided, each of these wheels is equipped with a low-pressure tie, or a balloon tie, and the front wheels are supported on the steering angle surface by the axle, both of them A straddle-type vehicle was developed in Japanese Patent Application Laid-open No. 5 (1972), which was equipped with a steering mechanism for steering both wheels via a link #11, and the steering mechanism was operated by a bar handle located approximately at the center of the vehicle body.
8-136576, the straddle type vehicle leg for traveling on rough terrain 1 has a small diameter wheel of about 7 to 9 inches, and supports the front wheel. The inner part of the wheel is a knuckle arm that extends from the king pin. Since this is not a problem, there is a provision 1 for the king pin to protrude from the side of the wheel to the inside of the heavy body. Accordingly, the king pin 10,000 set "fK" increases the king pin inclination and requires a large steering force.The present invention can also be applied to such vehicles for traveling on rough terrain, and the vehicle can be steered with a small force. In addition, it is an object of the present invention to provide a steering device that can bring the angle of the cut angle of the inner and outer wheels closer to the Ackermann theory when the vehicle turns. In the following, the present invention will be described with reference to the embodiment shown in the drawings. FIG. 2 is a side view showing the body frame of a four-wheeled vehicle to which the present invention is applied, and FIG.
7. : A plan view showing various devices. this four wheeler

[ is a straddle-type four-wheeled vehicle for traveling on rough terrain as described above, and has front wheels 2 and rear wheels 3 equipped with low-pressure ties on the front left and right sides and the rear left and right sides, respectively. The four-wheeled vehicle is equipped with a toe 4 in the upper center of the four-wheeled vehicle (t A body cover 6 is attached to the IC around the sort 4, and this body cover 6 [tX front fender 7 and nine fender 8 are integrally formed, and A bar handle 9 is provided at 1, and the driver swings the bar handle 9 to steer the front wheels 2 to the left.The vehicle body frame consists of a frame-shaped lower frame IO and an upper frame. Consisting of frames 11 and 'o), upper frame 11 tX normal σ
It is constructed like a motorcycle. That is, an upper frame 11, a head pipe 12, and a backbone tube 13 whose front end is fixed to the head pipe 12 and extends rearward together with the backbone tube 1.
30 cars jlllvc The front end is solidified together and extended rearward, and the rear part is curved downward. A pair of left and right glue sticks 1
It is composed of 5 and nl. Then, the lower frame 10)X has an intermediate part fixed to the lower end of the side pipe 14, a front end part fixed to the head pipe 12 via the stay 1(i), and a lower end part fixed to the lower end of the side pipe 14. The lower frame is equipped with an engine 7, and a transmission shaft [8, 19] extending from the engine 17 forward and backward connects the front wheels 2 and the rear wheels. 3 is driven. A steering arm 2t is rotatably fitted to the head pipe 12 of the upper frame 11, and the bar handle 9 is integrally attached to the upper end of this steering arm 20. The steering arm 21 is integrated with the lower end VC of the steering shaft 2'L, and the tip of the steering arm is connected to the lower end VC of the steering arm 21.
One left stone tie lock ¥ 23 cardinal layer via joint n
The outer ends of the seven tie rods (see Figure 2) are connected to the knuckle arms 251C in front of the left stone by ball joints 24, respectively. FIG. 3 is a vertical cross-sectional view of the right front wheel 2 viewed from the front, and the knuckle arm 25 is integrally fixed to the knuckle portion. 27 is a front axle housing that constitutes a part of the vehicle body, and upper axle housing 271
and the lower axle housing is divided into 272 parts.
Each axle hacking 271.27. n king pin fitting recesses < 711 ring fitting cylindrical portions are formed in each of the n king pin fitting recesses, the knuckle is fitted around the king pin in the king pin fitting recesses, and a bearing 29 is interposed in the bearing fitting cylindrical portions. The knuckle is fitted into the outer end of the front axle housing n. Accordingly, 1, knuckle 26 hacking bin inclination angle γ is vertical N
It is possible to tilt from 'Q) and swing to the left stone with the kingpin as the center. The outside of the front axle I [)
are connected, and this front feel shift maft 32
is attached to the front wheel 2vc, and the knuckle 26tlc is rotatably supported. The front wheel 2 is driven by the engine L7vc through the front wheel shaft 32, and as the knuckle arm 5 swings by operating the bar handle 9, the knuckle swings once around the king pin. As a result, I was steered to the left stone. The fourth figure 1 is a cross-sectional view showing the structure of the convex portion between the steering arm 21 and the tie rod. , 23oh construction ball joint 22. ．． 22, through 1stair 11ngarm 2Iv
The ball joint 221-2
2. &-! At the same point on the plane of the steering arm 21, one port 33 is provided below.
and nut 34 Niyotsuni steering arm 21 FC installed rLt. Such a connection has a simple structure, and allows the tie rods to be arranged rationally while avoiding interference with the differential gear, etc., and as described below, the Coupled with the rLK knuckle arm, which is disposed toward the rear rather than diagonally inward, it is impossible to give a suitable angle of cut to the supinated +11i wheel during steering. In this embodiment, t is particularly
As you can clearly see, the king don 28 is completely housed inside the front wheel 2 wheel + 11B BB3) and is located close to the center of the wheel, so the front wheels can be steered with a small amount of force. . Furthermore, the knuckle arm 25 extends diagonally from the kingpin position to the inside of the car body by turning and extending 1 point backward,
The inner end, ball joint 2.1, is located on the outside beyond the width B of the wheel. By doing this, even the front wheel with a small wheel size can be placed close to the kingpin center of the wheel as described above, but the knuckle arm that extends diagonally rearward has the following effects. In order to prevent the timer of each wheel from becoming distorted when the car turns, we can use Ackermann's theory C'ET to extend the inner axle of the front wheel. It is possible to set the steering angle of the inner and outer wheels so that the extension of the outer wheel axle intersects with the extension of the covered wheel axle. 9 gives a steering angle that adds to the steering shift, and when turning, the turning angle of the inner wheel becomes larger than the turning angle of the outer wheel, and a turning motion close to Ackermann's theory VC is obtained. The steering arm 21 and the king pin 281C are fixed.
A diagram showing the relationship between the knuckle arm 5 and the tie rod that connects the driver during steering.The solid lines indicate the positional relationships of the above-mentioned members 21.5 when moving straight ahead. Figure 5 shows only the knuckle arm of the right front wheel. When the vehicle is traveling straight, the steering arm 21 is in a neutral position along the front 1abix of the vehicle body, and the knuckle arm 5 is tilted inward by an angle φ from the front-rear direction. Now, move the steering arm 2] to the chain line position 21.
When the knuckle arm 5 is swung at the chain line position 5□, the steering angle θ is given to the bar handle 9.
Vc, versus Ishimae wheel, that is '0Fj, the inner ring cut n when turning
The angle is α. Similarly, when turning π, the steering arm 21 and the steering arm 5 move to the dashed line positions 212 and 252, respectively, and for the same steering angle θ, the turning angle of the outer right front wheel becomes β, and when turning right, the steering arm 21 moves to the chain line positions 212 and 252, respectively. is smaller than the cutting angle α. Knuckle arm 5 of the left stone painting front wheel is steering arm 2
For example, when turning to the right, when the right front wheel, which is the inner wheel, has a turning angle of α, the turning angle of the left front wheel, which is the outer wheel, is β. As described above, in the present UIAvc, the turning angle of the inner ring is always larger than the turning angle of the outer ring when turning, and it is possible to obtain steering close to the anchorman's theory. One of the above points, in the present invention, is that the front wheel is supported on the vehicle body by a king pin, and the knuckle arm extending from the king pin and the steering arm, which is supported by the vehicle body and extending from the steering shaft, are connected by a quirod. In the single wheel steering system which is connected to each other, the kingpin is installed inside the wheel of the wheel, and the kingpin is also installed inside the knuckle arm body so that it faces diagonally toward the small side. The wheel is placed near the center of the wheel so that the wheel can be steered with a small amount of force. ■A single-stroke Buddha: At the same time, it is possible to bring the n-angle of the inner and outer wheels closer to Ackermann's theory, allowing for rational steering.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the body frame of a four-wheeled vehicle to which the present invention is applied, Fig. 2 is a plan view showing the lower frame of the same four-wheeled vehicle and various devices mounted with the nVC, and Fig. 3 is the right side view. Cutaway front view of the front wheel - Figure 4 shows the steering arm and tie rod!
T! A cross-sectional view showing the connection part, and FIG. 5 is a K-th line diagram explaining the relationship between the steering angle and the turning angle of the front wheels. Rear wheel, 4...
°Sheet, 5...Step, 6...Body cover-
7...Front fender-18...Ritcho fender-
19...Bar handle, 10...Lower IIs frame-11...Upper frame, 12...Head pipe -13...Backbone tube, 14...Side tube, 15...Station stay, 16... Nutee,
17...Engine, L8-19...Transmission shaft, F)・
・・Steering arm I・, 21・Steering arm, 22 Pa° ball joint, O・・tie rod, 24・Ball joint I・, 6・Knuckle arm, 2G・Knuckle , 27...Front axle no.) Uzing, Road...Kingpin, 2'')...
Bearing-30...Front axle-31...
Constant velocity joint, 32 Pa front wheel mat,
33...Bolt, 34...Natsuto. Agent Patent attorney Ehara Nozomi 2 names, 1 picture, light 2 picture

Claims (1)

[Claims] The front wheel is supported on the vehicle body by a kingpin, and the kingpin'
o) A steering system for a vehicle comprising a knuckle arm extending from the steering shaft and a steering arm extending from the steering shaft supported by the vehicle body by a tie rod. A steering device for a vehicle in which a knuckle arm is disposed inside the vehicle body and directed diagonally backward, and the vehicle is on standby when the knuckle arm is turned to T'.