JP3072515U - Steering mechanism of front motorcycle - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The steering mechanism of the front two wheels of a bicycle having two front wheels must be as light as possible in weight and simple. However, conventionally, since the steering mechanism of an automobile was applied, the weight was heavy and the structure was complicated. SOLUTION: As a front two-wheel steering mechanism, a lever is extended backward from a fork shaft mounted on a vehicle body, and the tip of the lever is mounted on a connecting rod and a pin. The distance between the rods was reduced, and the connecting rod and the tip of the lever protruding backward from the handle shaft were pivoted at the center of the connecting rod with a pin.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a multi-wheel bicycle that does not fall over at least one front wheel and one rear wheel.

[0002]

[Prior art]

 Bicycles with two front wheels used the front wheel steering mechanism of the car.

[0003]

[Problems to be solved by the invention]

 The front wheel steering mechanism of the car was complicated, heavy and unsuitable for bicycles. Those who try to use a bicycle that does not fall are disabled and elderly people with weak legs. Bicycles should be as light as possible.

[0004]

[Means for Solving the Problems]

 When converting the trajectory of a circular arc into a linear motion, the linear motion is the largest at the tangent of the arc (perpendicular to the center), and gradually decreases as it deviates from it. Applying this, when the front two wheels bend, it is possible to draw the trajectories of the inner circle and the outer circle in the direction of the tangents, respectively, around the rear wheel, which are connected by one simple rod. I devised what I could do.

[0005]

[Embodiment of the invention]

 The purpose of the present invention is to arrange the handle shaft and the front two-wheel shaft (fork shaft) in parallel using a known shaft attachment part (head part), and to achieve the purpose by connecting the lever coming out of each shaft and one rod. Was completed.

That is, the head pipe 21 is provided at the upper center of the front body 27 of the vehicle body 28, and the handle shaft 14 is mounted on the head pipe 21 (the handle shaft 14 is integrated with the handle shaft pipe 15 by the bolt 13). A fork shaft 23 extending upward and integral with a front fork 24 having a front pipe 25 provided with a head pipe 22 at the lower portion on both sides is attached to the head pipe 22 (note that the fork shaft 23 and the fork pipe 4 are bolted together). 7).

As a method of connecting the handle shaft 14 and the fork shafts 23 on both sides of the handle shaft, the lever 5 fixed to the handle shaft pipe 15 and the lever 3 fixed to the fork pipe 4 are extended rearward. Although the connecting rod 2 and the pin 6 are axially attached at the tip of the lever 3, a good result can be obtained by appropriately shortening the axial attaching distance of the connecting rod pin 6 from the fork shaft center distance.

[0008] In other words, when the trajectory of the arc is changed to a linear motion, the tangent of the arc (perpendicular to the center) becomes the largest linear motion. Applying this, when the front two wheels bend, the trajectories drawn by the inner and outer circles of the front wheel, centering on the rear wheel, can be directed toward the respective tangents. This can be achieved by appropriately shortening the distance between the axes of the connecting rod 2.

When the connecting rod 2 and the end of the lever 5 which has come out from the handle shaft pipe 15 at the center of the connecting rod 2 are axially attached with the pins 8, the front two wheels are smoothly operated by operating the handle. And the bicycle can bend smoothly.

[Brief description of the drawings]

Fig. 1 Top view of front motorcycle

FIG. 2 is a right side view of the front motorcycle.

FIG. 3 is a plan view of a main part of the present invention.

FIG. 4 is a side view of a partial cross section of a main part of the present invention.

[Explanation of symbols]

 Reference Signs List 1 handle 2 connecting rod 3,5 lever 4 fork pipe 6,8 pin 7,13 bolt 14 handle shaft 15 handle shaft pipe 21,22 head pipe 23 fork shaft 24 fork 25 front wheel 27,28 body

Claims (1)

[Utility model registration claims] 1. A steering wheel axle for a bicycle is centered on a vehicle body in the center, and a fork to which a front wheel is attached and a fork shaft extending upward and integral with the fork are mounted on the vehicle body on both sides thereof. As a method of connecting the handle shaft and the fork shafts on both sides of the fork shaft, the levers fixed to each shaft are extended backward, and the levers of the fork shafts on both sides are attached to the connecting rods at the tips. The distance between the shafts of the connecting rods is shorter than the distance between them, and at the center of the connecting rod,
A steering mechanism for a front two-wheeled bicycle that is mounted on the tip of a lever that extends backward from the handle shaft.