JPH0417175Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is based on the following: a rod is provided under a base plate, and the lower end of the rod is elastically attached to the center of an axle with wheels rotatably attached on both sides. It is mounted so that it can swing with the body interposed between the wheels, and is equipped with a steering mechanism that has a pivot arm protruding diagonally from the center of the axle and whose tip is received in the base plate, so that it can be tilted due to asymmetrical loads. The present invention relates to a wheel used for a skateboard or the like whose axle is changed in direction in response to a base plate.

[Problems that conventional technology and ideas try to solve]

FIG. 3 shows an example of this type of wheel with a steering mechanism. That is, the wheels 20 on both sides are pivot arms 21
rotatably supported on an axle 21 formed with a
A lock nut 21b is screwed on to prevent it from falling off. The tip of the pivot arm 21a is received in an elastic pivot bushing 22c fitted in a hole 22a in the front bottom surface of the base plate 22 so that it can freely rotate within a predetermined small range and swing back and forth. A hole 21c is formed in the center of the axle 21, through which the king pin 23 is allowed to swing from below with a gap, and the tip of the hole 21c is inserted into the screw hole 2 on the bottom of the base plate 22.
2b. An axle 21 is arranged around the king pin 23 so that the base plate 22 is tiltably supported with respect to the axle 21, that is, the ground plane.
A lower action rubber 25a fitted into a lower recess (not shown), a retainer cap 25b holding this rubber, an upper action rubber 25c with a rigid stopper fitted into an upper recess 21d, and this A retainer cap 25d that holds the rubber is inserted. Then, the action nut 26 is further screwed into the king pin 23 to fix this pin to the base plate 22, and the action nut 26 is seated on the retainer cap 25b. When a load is applied to the right or left side of the base plate 22 with respect to the running direction,
The base plate 22 is tilted to the right or left, the elastic action rubbers 25a and 25c are deflected, and rotational force is generated on the axle 21. In other words, the axle 21 is
Depending on the load, the vehicle is symmetrically steered toward a right or left curve. Skateboards are widely used with wheels equipped with this type of symmetrical steering mechanism, but if the left and right steering is made asymmetrical, it can be used not only for skateboards and roller skates, but also for various play equipment and sports. It is thought that an unprecedented method of maneuvering the equipment will be realized.

Therefore, an object of the present invention is to completely limit the steering angle of one of the left and right sides or to a predetermined angle or more with a simple structure in a wheel with a steering mechanism of the type described at the beginning.

[Means and actions for solving problems]

In order to achieve this objective, the present invention has a steering mechanism in which the elastic body attached around the rod is distorted by asymmetrical loads, causing the base plate to tilt, and in response to this, the axle is deflected. By providing a rigid body having a downwardly sloped surface in the direction toward the side surface of the rod along the axle direction on a part of the periphery of the rod above or below the axle, the base plate is tilted to either the left or right side, that is, the axle is The deflection of one side was restricted, and only the inclination of the base plate along the inclined surface of the rigid body to the other side was allowed.

[Example of idea]

FIG. 1 shows a wheel with a steering mechanism according to the present invention, in which the action rubber 25c in FIG.
from the upper edge of the cylindrical shape surrounding the king pin 23 to the opposite lower edge.
An elastic body 28 that occupies the upper half of the divided shape and a rigid body 28 that occupies the lower half that functions as a stopper.
It was composed of a. The other parts have the same structure as in FIG. 3, and the same parts are designated by the same reference numerals.

FIG. 2 shows a case where this wheel with a steering mechanism is applied to a skateboard 10 with a power source. In the figure, when the base plate 22 is screwed to the board 11, the pivot arm 21a is directed outward with respect to the axle 21 of the front and rear wheels 20.

Reference numeral 30 denotes a drive wheel equipped with an engine 31 as a power source, and its ground contact surface 30a is lower than the ground contact surface 20a of the wheel 20. The drive wheel 30 is supported by its axle on brackets 32 on both sides provided under the central bottom surface of the board 11. Power from an engine 31 screwed onto the top surface of the board 11 is transmitted to the wheels via reduction gears 34 to 36 attached to a bracket 33 erected on the board 11. That is, the gear 34 fixed to the drive shaft of the engine 31 rotates the sprocket 36 via the gear 35, and therefore the chain 3 is connected to the sprocket 37 fixed to the rotation shaft of the drive wheel 30.
Power is transmitted by 8. Further, the axle of the drive wheel 30 is offset by an angle α with respect to the axle of the front and rear wheels 20 when the vehicle is not being steered, and therefore the board 1
The maximum diameter positions 10a, 10b of the sides 1 are also correspondingly offset from each other.

The operation is as follows.

When the rider rides on the board 11 and starts the engine 31, the sprocket 37 is rotated via the gears 34, 35, the sprocket 36, and the chain 38, thereby causing the drive wheel 30 to rotate. In FIG. 2, for example, if you put your weight on the front of the drive wheel 30, the wheel 20 on that side rotates on the ground according to the rotation direction of the engine 31, and the extension line 20a of the axis of the axle 20 and the extension line of the axis of the drive wheel 30 It curves in the direction of arrow A along a circle centered on the intersection point _O1 with 30a. Furthermore, if you put your weight on the right side, the rigid body 2
Since the upper end of 8a is tapered, the base plate 2
2 smoothly tilts to the right along the inclined surface of the rigid body 28a, and the elastic action rubber 25a, 2
8 is deflected, and rotational force is generated on the axle 21. Therefore, the axle 21 of the front wheel 20 is turned to the right, and the running direction is steered in the range from the arrow A direction to the arrow B direction, with the running radius reduced according to the body weight and its load position. The rigid body 28a occupies the lower diagonal half of the cylindrical shape, and therefore has a thick base and is strong.

When the weight is applied to the left side, the rigid body 28a prevents the base plate 22 from tilting, making steering impossible. When you put your weight on the back side of the board 11, the rear wheels 20 rotate on the ground, and the running direction turns in the direction of arrow C along a circle centered at the intersection _O2 of the extension lines 20b and 30a of their respective axes. Change. Then, with this direction as a reference, by adjusting the weight on the left side, the axle 21 changes to the right side with respect to the running direction, further curves to the left with a smaller running radius, and on the other hand, arrow C
Steering to the right of the direction is not possible.

In addition, in FIG. 1, the elastic body 28 and the rigid body 28a
If the position is rotated by 180 degrees, the vehicle will be steered in the range from the directions of arrows A and C to the direction of arrow D in FIG. The rigid body 28a and the elastic body 28 may be used for the lower action rubber 25a. It is also possible to use it for both upper and lower action rubbers. By mounting another elastic body above the rigid body 28a, it is also possible to make the axle changeable within a narrow range even on the restricted side. This invention is an engine,
Of course, this also applies to ordinary skateboards that are not equipped with a power source such as a motor.

[Effect of idea]

As described above, according to the present invention, it is possible to obtain a left-right asymmetric steering mechanism with a simple, compact, and robust structure in which the steering angle on either the left or right side is limited. Therefore, when applied to a skateboard or the like, it becomes possible to realize a recreational vehicle with a novel maneuvering method that increases the difficulty of riding and enhances the sportiness.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a wheel with a steering mechanism according to the present invention, Fig. 2 shows a skateboard using the wheel with a steering mechanism of Fig. 1, and a is a plan view thereof;
b is a side view thereof, c is a rear view thereof, and FIG. 3 is an exploded perspective view of a conventional wheel with a steering mechanism. 10...Skateboard, 11...Board, 2
0...Wheel, 28...Elastic body, 28a...Rigid body,
30...Drive wheel.

Claims (1)

[Scope of utility model registration request] A rod is installed below the base plate on which a load is applied, and the lower end of the rod is swingably attached to the center of the axle, which has wheels rotatably attached on both sides, with an elastic body interposed around the rod. A wheel equipped with a steering mechanism in which a pivot arm is protruded diagonally from the shaft and its tip is received in a base plate, and a part of the periphery of the rod has a downwardly sloped surface in a direction toward the side surface of the rod along the axle direction. A wheel with a steering mechanism characterized by having a rigid body.