JPH0445398B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering device for a vehicle, such as a motorcycle or a tricycle, which has a single front steering wheel.

(Prior Art) A steering device for a vehicle having one front wheel, such as a motorcycle, has conventionally been configured as follows.

That is, the upper portions of the left and right front forks that support the front wheels are pivotally connected to a head tube provided at the front of the frame at upper and lower bridges via a steering shaft, and a bar handle is attached to the upper bridge via a handle bracket. ing.

(Problems to be Solved by the Invention) In such conventional steering devices, the mounting position of the handle is limited due to the head tube, and the operating position and angle of the handle are restricted, making it difficult to obtain a free operating position and angle. Ta.

The present invention improves the above-mentioned problems of the conventional steering wheel and allows the steering wheel operating position and angle to be set arbitrarily.The purpose of the present invention is to improve the steering stem connected to the steering wheel and the wheel suspension system. A separate steering stem is provided,
The support tubes of each stem are connected to each other while restricting movement in the lateral direction with respect to the longitudinal direction of the vehicle body, and each stem is connected with a rod having a pole joint. It is an object of the present invention to provide a steering device in which the mounting angle, operating position, and operating angle can be arbitrarily set.

(Means for Solving the Problems) In order to solve the above problems, a steering device for a vehicle according to the present invention includes a steering stem connected to a steering wheel, and a steering wheel connected to a wheel suspension system provided separately from the steering stem. The steering stem is composed of a stem, a support member interposed between the two stems to restrict lateral movement, and a rod connecting each stem via a universal joint, and the steering stem connected to the handlebar is connected to the steering stem. The support member is arranged to be swingable in the front and back direction with respect to the support member, and
A means of explosive was interposed between the two.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view of a motorcycle, and the embodiment shows a scooter. A front wheel 2 is installed at the front of the vehicle body covered with a cover 1, a seat post 4 is installed at the rear of the step section 3 of the vehicle body, a seat 5 is installed at the top of this, and a rear wheel 2 is installed at the rear lower part. A power unit 7 supporting the engine 6 is pivotally extended, and the power unit 7 consists of an engine and a transmission case unit.
The front part is pivotally connected to the vehicle body and is configured to swing freely.

FIG. 2 is a perspective view of the steering device, FIG. 3 is a side view thereof, and FIG. 4 is a longitudinal sectional view thereof.

The front wheel 2 is supported at the lower part of a front fork 8 constituting a suspension system, and the front fork consists of left and right members as is known, and the members are connected by a bridge 9 at the upper end. A steering stem 10 is provided protrudingly.
On the other hand, a head tube 12 is fixedly installed at the front end of the frame 11 covered with the cover 1. A steering stem 10 is fitted vertically in the head tube 12, and bearings 1 are provided above and below the head tube 12.
3 and 14, the stem 10 is rotatably supported. A top plate 15 corresponding to a top bridge is disposed on the head tube 12, and the above-described upward protrusion of the head tube of the stem 10 is passed through the center of the top plate 15, and the threaded portion 1 at the tip of the stem 10 is passed through the center of the top plate 15.
0a from above, the top plate 15 is fastened in the axial direction, and the opposing races 13a, 14a of the bearings 13, 14 are tightened between the bottom surface of the top plate 15 and the top surface of the bridge 9.

A support stay 17 is protrudingly provided at the front middle part of the 12 circumferences of the head tube, and the stay 17 is made of a press-formed steel plate or the like, and has a substantially L-shape with a large side angle and a channel-shaped cross section. It is fixed to the middle part of the 12 circumferences, and the upper half part 17b is inclined with respect to the stem axis N so that the upper part is inclined backward. The upper half of the support stay 17 faces above the top plate 15, and the upper end of the support stay 17 has a bifurcated bracket 19 projecting from the rear of the upper circumference of the support tube 18 of the second steering stem 21. The left and right pieces are inserted so as to overlap the left and right upper ends of the support stay, and are pivoted to the upper part of the support stay 17 with bolts 20 so that the upper part of the support cylinder 18 faces forward and upward so as to be swingable in the front and rear directions.

A second steering stem 2 is disposed within the support tube 18.
1 is rotatably passed vertically through bearings 22 and 23 provided at both ends of the cylinder, and a handle pipe 24 constituting a handle is connected to a threaded protrusion 21a from the upper end of the support cylinder 18 of the stem 21 through a nut 25. A grille 26 is provided at both ends of the handle pipe 24. The center portion of a connecting arm 27 is fixed to the outer extending portion of the lower end of the cylinder of the stem 21, and the arm portions 27a, 27a of the arm 27 extend left and right, respectively.On the other hand, arm portions 15a are provided on the left and right sides of the top plate 15 mentioned above. , 15a are extended. Arm part 2
The respective outer ends of 7a and 15a are connected via ball joints 29, 29 by rods 28, 28 provided between them.

A skirt member 30 is provided below the front of the support tube 18.
The upper part of the member 30 is fixed to the support cylinder 18, and the member 30 has a hanging piece constituting a spring receiving part 30a bent and hanging downward, and the spring receiving part 30a and the upper part of the lower half part 17a of the support stay 17 are connected to each other. A coil spring 31 as an elastic means is compressed between the skirt members 30,
Therefore, the support cylinder 18 has a fourth position with the bolt 20 as a fulcrum.
In the figure, it is rotated clockwise. The second steering stem 21 connected to the handle pipe 24 is disposed above and in front of the first steering stem 10 so that the lower part thereof is forward and the upper _part thereof is inclined backward.

Next, to explain the operation and effect in detail, when the handle pipe 24 is moved left and right via the handle grip 26, the second steering stem 21 rotates, and the arm 27 at the lower end of the second steering stem 21 swings back and forth using the stem 21 as a fulcrum. The rod 28 is moved back and forth, pulled or pressed, and the top plate 15 swings via the arm portion 15a connected thereto. communicated. The swing of the top plate 15 is controlled by the first plate rotatably supported by the head tube 12.
is transmitted to the steering stem 10 of the stem 1.
0 rotates, the rotational force is transmitted to the bridge 9 of the front fork 8, and the front fork 8 is swung left and right to perform steering.

In the above, the support tube 1 by the support stay 17
8 is fixed, the left and right movement of the steering stem 21 is restricted, and the elastic force of the coil spring 31 biases the support cylinder 18. Therefore, the elastic force in the tensile direction is always applied to the rod 28, and the ball Joint 29
absorbs the looseness of

In the above embodiments, an example in which the present invention is applied to a scooter-type motorcycle has been described, but the present invention can be implemented in other motorcycles and tricycles having one steering wheel.

(Effects of the Invention) As is clear from the above, according to the present invention, the following effects are achieved in a motorcycle.

The mounting position, mounting angle, operating position, and operating angle of the handle can be set arbitrarily.

It has a simple structure.

It uses a ball joint and uses a spring to absorb play, allowing for smooth and accurate operation.
Improves driving operability.

The handle stem swings back and forth, and the rattling of the rod when turning the handle from side to side can be suppressed.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a side view of the motorcycle, FIG. 2 is a perspective view of the steering device, FIG. 3 is a side view of the same, and FIG. 4 is a longitudinal sectional view of the same. be. In addition, 10 and 21 in the drawing are steering stems, and 8
1 is a suspension device, 17 is a support member, 28 is a rod, 2
9 is a joint.

Claims (1)

[Claims] 1. A steering stem connected to a steering wheel, a steering stem connected to a wheel suspension system provided separately from the steering stem, and a support member interposed between the two stems to restrict lateral movement of both stems. , a rod connecting each stem via a universal joint, and a steering stem connected to the steering wheel is arranged so as to be swingable in the front and back direction with respect to the support member, and an elastic means is provided between the two. A steering device for a vehicle, characterized in that a vehicle steering device is provided with.