JPH0427876B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a board with wheels that can be steered according to the position where the body weight is applied to the front and rear of the board. This invention relates to a skateboard designed to travel in a straight line or in a curve.

[Problems to be solved by conventional technology and invention]

Conventional skateboards of this type have wheels with a steering mechanism at the front and back of the board that are controlled according to the left and right position of your weight on the board, and when you shift your weight to the side of the curve, the axle of the front wheel moves to the side of the curve. The axle of the front and rear wheels is deflected to the opposite side, thereby making a curve. This allows you to run a slalom by shifting your weight alternately from side to side. In short, these steering operations were performed only in accordance with the movement of the body weight in the left-right direction on the board with respect to the running direction.

In view of this point, it is an object of the present invention to provide a skateboard that allows steering by various weight shifts.

[Means for solving problems]

In order to achieve this object, the present invention has a ground plane in the center of the board 1 that is lower than the ground planes of the front and rear wheels 2 and 3, and an axle of the wheels 2 and 3, as shown in FIG. Another wheel 4 is mounted which is inclined by a predetermined angle α with respect to the axle. Wheels 2 and 3 are board 1
It is equipped with a steering mechanism that is steered according to the left and right position of the weight on top.

[Effect]

The board 1 performs a see-saw motion with the wheels 4 as a fulcrum depending on which side of the wheels 4 is more heavily weighted, front or rear. In Figure 2, if you put your weight forward while moving in the direction of arrow A, the wheels 2
touches the ground and rotates. Therefore, the intersection of the extension line 2a of the axis and the extension line 4a of the axis of the wheel 4
Turn in the direction of arrow B along a circle centered at _O1 . Conversely, when the weight is added later, the wheel 3 rotates on the ground, and the intersection of the extension lines 3a and 4a of the respective axes
It curves in the direction of arrow C along a circle centered at _O2 .

If the weight is further shifted to the left or right while moving in the direction of the arrow B or C, the steering mechanism of the wheels 2 or 3 is activated and the respective axles 2b or 3b change direction. Thereby, the traveling direction can be further changed based on the arrow B or C direction.

In addition, in the state shown in Fig. 2, the axle of wheel 4 is connected to wheels 2 and 3.
If the vehicle is tilted in the opposite direction with respect to the axle of , the vehicle will travel in the direction of arrow C when the wheels 2 touch the ground, and in the direction of the arrow B when the wheels 3 touch the ground.

[Embodiments of the invention]

FIG. 3 shows an embodiment as a power board 10 with a power source. Reference numeral 20 denotes wheels with steering mechanisms installed at the front and rear of the board 11. Reference numeral 30 denotes a drive wheel at the center of the board 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 steering mechanism for the wheels 20 may be of a well-known type, for example as shown in FIG.
1b is screwed on. The tip of the pivot arm 21a is connected to the hole 22 on the front bottom of the base plate 22.
Elastic pivot butting 22c fitted in a
It is received in such a way that it can freely rotate within a small predetermined range and can swing forward and backward. A hole 21c is formed in the center of the axle 21, through which the king pin 23 can similarly swing from below with a gap, and the penetrating tip is screwed into a screw hole 22b on the bottom surface of the base plate 22. Around this king pin 23, a lower action rubber 25a is fitted into a recess (not shown) on the lower side of the axle 21 so as to support the base plate 22 in a tiltable manner with respect to the axle 21, that is, the ground surface. A retainer cap 25b for holding this rubber, an upper action rubber 25c fitted into the upper recess 21d, and a retainer cap 24d for holding this rubber are inserted. Then screw the action nut 26 into the kingpin 23 like this.
The action nut 26 is seated on the retainer cap 25b with the action nut 26 fixed to the base plate 22. When screwing the base plate 22 to the board 11, the pivot arm 21a is directed outward with respect to the axle 21 of the front and rear wheels 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 is the gear 35.
The sprocket 36 is rotationally driven through the chain 38, and the power is transmitted to the sprocket 37 fixed to the rotating shaft of the drive wheel 30 through the chain 38. Also,
The axle of the drive wheel 30 is offset by an angle β with respect to the axle of the front and rear wheels 20 when not being steered, and therefore the maximum diameter position 10a on the side of the board 11,
10b 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. 3, for example, if you put your weight on the front of the drive wheel 30, the wheel 20 on that side will touch the ground and travel in the direction of arrow E according to the rotational direction of the engine 31. Furthermore, when you put your weight on the left side, the base plate 22
tilts to the left, elastic action rubber 25
a and 25c are deflected, and rotational force is generated on the axle 21. Therefore, the axle 21 of the front wheel 20 changes direction from the solid line position to the dotted line position, and the running radius increases according to the body weight and its load position, and the running direction changes from the arrow E direction to the straight arrow D direction. Steered within range. If you put your weight on the right side, the axle 21
turns in the opposite direction, resulting in a smaller travel radius,
Steering is performed in a range from the direction of arrow E to the direction of arrow F. When weight is applied to the rear side of the board 11, the running direction is switched to the direction of arrow G, and by adjusting the left and right weight based on this direction, steering is performed within a range from a smaller running radius to the straight direction D.

Note that the present invention is naturally applicable to ordinary skateboards that are not equipped with a power source such as an engine or a motor. Further, the steering mechanism of the wheels 20 is not limited to the one shown in FIG. 4, and can be replaced with various known or new structures that allow the vehicle to turn left and right by shifting its weight from side to side.

〔Effect of the invention〕

As described above, according to the present invention, the board not only seesaws by moving the board's weight back and forth, but also changes its traveling direction from side to side by switching its tilt. In addition to such steering, conventional steering by shifting the weight from side to side can be added. In other words, not only will a new steering method be created, but the difficulty of riding the vehicle will also increase, and the sportiness will also increase.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a skateboard according to the present invention, FIG. 2 is an explanatory diagram of the operation of the skateboard according to the present invention, and FIG. 3 is a diagram showing a skateboard according to an embodiment of the present invention. b is a side view thereof, c is a rear view thereof, and FIG. 4 is an exploded view of the axle with a steering mechanism of the skateboard according to FIG. 3. 1, 11... board, 2, 3, 4, 20... wheel, 30... driving wheel.

Claims (1)

[Claims] 1. In a skateboard in which wheels are attached to the front and rear of the board that can be steered according to the left and right positions on the board where the weight is applied, the ground contact surface is lower than the ground contact surface of the wheels, and the axle is fixed to the ground when the wheels are not being steered. A skateboard, characterized in that another wheel, which is inclined with respect to the axle, is attached to the central part of the board.