JPS6342070Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to auxiliary wheels for two-wheeled vehicles such as scooters and motorcycles.

<Prior Art> It is known that auxiliary wheels are attached to the frame of a scooter or motorcycle, or to a body mounted on the frame, via a simple suspension mechanism. This traditional training wheel can be used or not,
Control methods include raising and lowering the auxiliary wheels using a motor, etc., and setting a certain gap between the auxiliary wheels and the ground in advance so that the auxiliary wheels touch the ground only when the body is tilted, and not directly. There is. In these conventional structures, the suspension system structure is relatively expensive and is disadvantageous in terms of price competitiveness. In addition, the ground pressure of the auxiliary wheels could not be controlled arbitrarily, which caused problems in running stability during cornering.

Furthermore, Japanese Utility Model Application No. 49-54247 also discloses an auxiliary wheel device for a two-wheeled motor vehicle. In this device, the auxiliary wheels are lifted above the ground contact position and the ground surface by the vertical movement of the operating lever, and the pawl provided on the operating lever is swung by the protrusion and the wire. The structure is such that the operating rod is locked in a predetermined position by engaging and disengaging the claw piece from the ratchet tooth.
This one not only has a complicated structure, but also
If the wire is cut, it becomes impossible to lift the auxiliary wheel or unlock the pawl piece, which poses a problem that causes inconvenience to two-wheeled running.

<Purpose of the invention> The purpose of the invention is to ensure lateral stability when parking or stopping or at very low speeds, and to enable two-wheeled driving by lifting the vehicle above the ground surface during normal driving using a simple mechanism and operation. This provides a training wheel that solves the problems.

<Structure of the invention> The structure of the invention is that a support pipe extending in the left-right direction is rotatably attached to the frame of a two-wheeled vehicle, and auxiliary wheels are supported at both ends of this support pipe so that they can be elastically displaced in the vertical direction by elastic members. Further, the frame is provided with an operation pedal device having a mechanism for vertically rotating the support pipe and locking the downward rotation position.

<Examples> Examples of the present invention will be described below based on the drawings.
In FIG. 1, 1 is a frame of a two-wheeled vehicle.
A support pipe 2 extending in the left and right direction on this frame 1
is rotatably mounted by a bracket 3, and auxiliary wheels 4 are supported at both ends of the support pipe 2 by leaf springs 5 so as to be elastically displaceable in the vertical direction.

Further, the frame 1 is provided with an operation pedal 6 having a mechanism for vertically rotating the support pipe 2 and locking the downward rotation position.

The specific structure of the mechanism of this operation pedal 6 is explained in the second section.
This will be explained using figures.

A first linkage 8 integrally provided on the lower surface of the pedal 6 is pivotally connected to a bracket 7 fixed to the frame 1 by a pin 9, so that the pedal 6 can swing freely in the front and rear directions using the pin 9 as a fulcrum. A stopper part 10 is provided at the top of the tip of the first linkage 8, and a second
The linkage 12 is attached to the tip of the first linkage 8 with a pin 1.
It is refractably pivoted via 3.

On the other hand, an arm 11 is fixed upward to the support pipe 2 to which the auxiliary wheel 4 is attached, and the upper end of this arm 11 and the other end of the second linkage 12 are pivotally connected by a pin 14. A tension spring 15 is attached between this pin 14 and a pin 16 fixed to the bracket 7, so that the support pipe 2 is constantly urged to rotate upward.

Since the present invention has the above-mentioned structure, the solid line in FIG.
The linkage 12 is connected to the second linkage 12 at a position where the pivot point by the pin 13 is slightly beyond the dead point.
One end is in contact with the stopper part 10, and the support pipe 2
is rotated downward to lock the grounding state of the auxiliary wheels 4. The plate spring 5 of the auxiliary wheel 4 that has touched the ground is slightly bent, and the auxiliary wheel 4 is grounded with an appropriate ground pressure. Also,
The first linkage 8 and the second linkage 12 are beyond the dead point as described above, and the second linkage 12 is in contact with the stopper portion 10, so that
Even if a moment is generated to cause the arm 11 to fall forward due to the acting force of the spring 15 and the ground reaction force, the arm 11 cannot fall forward. Therefore, the auxiliary wheels 4 can maintain proper contact with the ground against lateral instability forces such as unevenness of the ground, the driver getting on and off, and slow slalom, and prevent the two-wheeled vehicle from falling over significantly. Furthermore, when performing slow slalom with the training wheels 4 in contact with the ground, a side force acts on the training wheels 4, but since there is an offset between the torsion center of the leaf spring 5 and the grounding point, the leaf spring 5
By twisting, the side force of the auxiliary wheel 4 is absorbed.

To release the lock shown in the solid line in FIG. 2, depress the rear side of the pedal 6 to release the first
The pivot point between the linkage 8 and the second linkage 12 bends beyond the dead point, and the arm 11 falls forward due to the tensile action of the spring 15, and the second linkage 12 comes into contact with the end of the topper portion 10 at the maximum bending position. , hold that state. As the arm 11 falls forward, the support pipe 2 rotates upward, and the auxiliary wheel 4 lifts and leaves the ground. At the maximum bending position, the auxiliary wheels 4 are at the highest position, and the two-wheeled vehicle can completely run as a two-wheeled vehicle.

In addition, in the intermediate state from the lowest position to the highest position of the auxiliary wheel 4, the back and forth rocking motion of the pedal 6 is controlled while adding the moment around the pin 9 of the pedal 6 based on the acting force of the spring 15. By adjusting the amount, it is possible to arbitrarily control the ground pressure of the auxiliary wheels 4.

<Effects> As described above, according to the present invention, there is a first linkage that swings together with the pedal, and a linkage that is pivotably connected to the first linkage so as to be bendable and extensible, and comes into contact with a stopper portion formed on the first linkage in the extended state. With a structure consisting of a second linkage that is restricted and pivotally connected to the arm of the support pipe, the auxiliary wheel can be securely held in the lowest position for ground contact and the highest position for two-wheel running by operating the pedals. At the same time,
The ground pressure of the training wheels can be adjusted arbitrarily according to the force applied to the pedals, and when the system is in contact with the ground at the lowest position, the side force applied to the training wheels can be absorbed by the elasticity of elastic members such as leaf springs. As a result, the simple structure ensures lateral stability when parking or stopping or at slow speeds, and allows the vehicle to run on two wheels during normal driving, providing an inexpensive auxiliary wheel without sacrificing the driving performance (cornering) of two wheels. There is a potential effect.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the present invention, and FIG. 2 is a side view of the operating mechanism of the present invention. 1... Frame, 2... Support pipe, 4... Training wheel, 5... Leaf spring, 6... Pedal, 7... Bracket, 8... First linkage, 9... Pin, 1
0... Stopper portion, 11... Arm, 12... Second linkage, 13, 14... Pin, 15... Spring, 16... Pin.

Claims (1)

[Scope of utility model registration request] A support pipe 2 extending in the left-right direction between the front and rear wheels of a frame 1 of a two-wheeled vehicle is rotatably attached by a bracket 3, and auxiliary wheels 4 are attached to both ends of this support pipe 2.
is supported so as to be elastically displaceable in the vertical direction via a spring 5, and a first linkage 8, which is integrally provided on the lower surface of the pedal 6 with a bracket 7 fixed on the frame 1, is swung back and forth by a pin 9. A stopper part 10 is provided at the top of the tip of the first linkage 8, and a second linkage 12, whose one end abuts the stopper part 10 from below, is bent at the tip of the first linkage 8 via a pin 13. An arm 11 is fixed to the upper end of the support pipe 2, and this arm 11 and the second linkage 12 are pivotally connected with a pin 14, and a tension tension member is attached between the pin 14 and the bracket 7. A auxiliary wheel for a two-wheeled vehicle characterized by having a spring 15 attached thereto.