JP6784004B2 - skateboard - Google Patents

Description

The present invention relates to a skateboard.

As a type of skateboard, a front board and a rear board are provided, and the front board and the rear board are elastically twisted in opposite directions around the axis in the front-rear direction depending on the weight and leg strength of the operator. Some are configured to be deformable (Patent Document 1). In the skateboard described in Patent Document 1, casters equipped with rollers are attached to the bottom surface of the front board and the bottom surface of the rear board, respectively, and the casters are oblique to the vertical axis in a side view. It is configured to swing its head around a forward-sloping axis. As a result, the turning steerability is good, and it is possible to travel on, for example, a corrugated path, that is, a plurality of continuous S-shaped paths.

However, in the skateboard described in Patent Document 1, the rollers of the front and rear casters are all one wheel. For this reason, the casters of each of the front and rear wheels swing their heads around the axis that is inclined diagonally forward with respect to the vertical axis in the side view, so just like a bicycle, the stability is poor when running and when stopped. The front and rear boards cannot be held horizontally.

For this reason, the stability at the start of running is not good, and skill is required for the operation from the stopped state to the stable running state.

In order to eliminate this instability, it is considered that both the front side and the rear side should be two wheels, that is, a total of four wheels.

Special Table 2005-537820A

However, if the front two wheels and the rear two wheels are used, the resistance from the road surface when the caster swings is large, which makes it difficult to make a stable turn during running, which is as good as the case of one front and rear wheel. It becomes difficult to exhibit good steerability.

Therefore, an object of the present invention is to solve such a problem and to improve the turning steerability of a skateboard having two wheels, that is, a total of four wheels, on both the front side and the rear side.

To achieve this goal, the skateboard of the present invention
The board has a front track and a rear track,
A hanger is attached to the base plate of the front truck and the rear truck via a kingpin and a bush.
The front track has a structure in which the base plate is rotatable around a first axis that is inclined forward.

In such a configuration, since both the front truck and the rear truck have hangers, the left and right two wheels are equipped with the hangers, and therefore the front and rear four wheels are provided. In addition, it is excellent in stability during running, especially at the start of running. Not only that, because the hanger is attached to the base plate using an elastic bush, it can exert a spring action on the road surface side of the base plate, so the board can be placed against the road surface where the wheels are in contact with the ground. It can be flexibly displaced. At this time, in the skateboard of the present invention, since the base plate is rotatable around the first axis that is inclined forward, the operator moves the axis in the front-rear direction to the front part of the board by weight or leg force. By giving a displacement around it, it is possible to generate a good steering force on the front wheel supported by the hanger, or to generate a forward propulsive force on the front wheel. In that case, the spring The action allows the board to be flexibly and smoothly displaced. Therefore, even though it is a four-wheeled skateboard, its turning operability can be made exceptionally good.

It is a three-dimensional view of the skateboard of Embodiment 1 of this invention. It is the whole side view of the skateboard. It is an enlarged side view of the front truck of the skateboard. It is an enlarged side view of the rear truck of the skateboard. It is the whole plan view of the skateboard. It is the bottom view of the whole of the skateboard. It is an enlarged three-dimensional view of the front truck of the skateboard. It is a bottom view of the skateboard of Embodiment 2 of this invention. It is an enlarged three-dimensional view of the rear truck of the skateboard. It is a bottom view of the skateboard of Embodiment 3 of this invention. It is an enlarged three-dimensional view of the front truck of the skateboard. It is an enlarged sectional view of the front truck of the skateboard.

(Embodiment 1)
1 to 7 show a skateboard according to the first embodiment of the present invention. Here, reference numeral 11 denotes a board, which is formed of resin or the like. The board 11 has a configuration in which the front side portion 12 and the rear side portion 13 are connected to each other in the front-rear direction, and the front side portion 12 and the rear side portion 13 are axes in the front-rear direction depending on the weight and leg strength of the operator riding on the board 11. It is configured so that it can be elastically twisted and deformed around the heart in opposite directions. Since such a board 11 itself is described in Design Registration No. 1376897 and other texts and is well known to those skilled in the art, the details of its structure will be omitted.

The front truck 14 is mounted on the lower surface of the front portion 12, and the rear truck 15 is mounted on the lower surface of the rear portion 13. In the front and rear tracks 14 and 15, 16 and 17 are thrust bearings, and all of these thrust bearings 16 and 17 are made rotatable around the axial center 18 and 19 which are inclined forward. That is, the axial centers 18 and 19 are provided in an inclined state so that the upper side thereof is located on the front side of the lower side.

In the front truck 14 and the rear truck 15, base plates 21 and 21 are attached to the lower side of the thrust bearings 16 and 17. That is, the base plates 21 and 21 are rotatably supported around the axes 18 and 19 by thrust bearings 16 and 17. The base plate 21 has a structure similar to that widely used for a normal skateboard having a plate-shaped board and four wheels.

A hanger 24 is attached to each base plate 21 by a kingpin 22 and a kingpin nut 23. Bush 25 and 26 are mounted between the hanger 24 and the base plate 21 and between the hanger 24 and the king nut 23, respectively. The kingpin 22 penetrates the bushes 25 and 26. The bushes 25 and 26 are made of an elastic body having spring elasticity such as synthetic rubber, and are provided so as to elastically support the hanger 24 with respect to the base plate 21. An axle 27 is provided on the hanger 24, and the left and right wheels 28, 28 are attached using the axle 27. A pivot 29 is provided on the hanger 24, and the pivot 29 is fitted into the pivot cup 30 of the base plate 21 via a pivot bush (not shown).

The illustrated kingpin 22, kingpin nut 23, hanger 24, bushes 25, 26, axle 27, wheels 28, pivot 29, pivot cup 30, and the pivot bush not shown are all like the base plate 21. It has the same configuration as that widely used for ordinary skateboards equipped with a plate-shaped board and four wheels.

In the illustrated example, the hanger 24 is configured to be attached to the base plate 21 by a kingpin 22.

In the illustrated skateboard, the rotational resistance of the rear track 15 around the axial center 19 is configured to be larger than the rotational resistance of the front track 14 around the axial center 18. Specifically, in the front track 14, the base plate 21, the hanger 24, and other members are supported by thrust bearings 16 so that they can rotate freely around the axis 18. On the other hand, the rear truck 15 is provided with a restoration spring 32 for restoring the base plate 21 and other members to a neutral position, that is, a position not swinging to the left or right. The restoration spring 32 is composed of a pair of tension coil springs 33, 33, one end of which is connected to the center of the boat 11 at a position away from the base plate 21. The other ends of the tension coil springs 33 and 33 are connected to positions on the base plate 21 at distances to the right and left from the center, respectively. As a result, the pair of tension coil springs 33, 33 are arranged in a V shape centered on one end, and when the base plate 21 or other member swings its head to the right or left, the springs 33, 33 By causing elongation in one of them, the above-mentioned restoring force is exhibited. Further, with such a structure having resilience, it is possible to prevent the rear truck 15 from rotating too much more than necessary. Although not shown, it is preferable that the front truck 14 is provided with a stopper that prevents the front truck 14 from rotating excessively.

According to such a configuration, when the operator rides on the board 11 and tilts the board 11 in either the left or right direction depending on the weight or leg strength, the tracks 14 and 15 move around the axial centers 18 and 19 which are inclined forward. Since it has a rotating configuration, it turns to the right or to the left in response to the inclination of the board 11. This allows the operator to steer the board 11 especially with the front truck 14. Further, when the front side portion 12 of the board 11 is tilted to one of the left and right directions and the rear side portion 13 is repeatedly tilted to the other in the left and right directions, that is, the front side portion 12 and the rear side portion 13 are in opposite directions. By repeating elastically deforming the board 11 so as to be twisted, a propulsive force can be generated in the wheels 28.

At this time, since the bushes 25 and 26 are provided on both the front and rear tracks 14 and 15, the spring action can be exerted on the road surface side of the base plate 21, and therefore the board 11 is flexible with respect to the road surface. Can be displaced to. That is, when the board 11 is swiveled or propelled, the operator can flexibly and smoothly displace the board 11 by the spring action. Therefore, according to the skateboard of the first embodiment, since the skateboard is provided with four front and rear wheels, it is not only excellent in stability during running, particularly stability at the start of running, but also its turning operability and propulsion operability. Can be exceptionally good.

If the configuration does not have the bushes 25 and 26, for example, the axle 27 is directly attached to the base plate 21, it is possible to realize the turning operation and the propulsion operation in the same manner, but pay attention to the front truck 14, for example. Then, since two wheels are provided at a distance to the left and right, the resistance from the road surface when turning to the road surface is larger than that of one wheel.

According to the first embodiment, since the restoring force to the neutral position is applied to the rear truck 15 as described above, the steerability of the rear truck 14 is mainly borne by the front truck 14. Since this has the same configuration as a bicycle having a steering wheel only on the front side, it is possible to emphasize running stability and achieve steering ease because it can be steered only by operating the front side track 14. ..

On the other hand, in the first embodiment, the configuration without the restoring spring 32, that is, the rear truck 15 is also configured to be rotatable around the axis 19 like the front truck 14, in other words, the rear truck 15. It is also possible to have a configuration in which the rotational resistance around the axis 19 is reduced in the same manner as in the front track 14. In that case, since the front and rear tracks 14 and 15 are all rotatable around the axes 18 and 19, the steerability can be further improved. For example, the board 11 as compared with the case where the restoration spring 32 is provided. It is possible to reduce the turning radius when traveling. In other words, it can be a skateboard with a small turn. Similarly, the generation of additional propulsion during driving can be achieved more easily.

In the illustrated example, as the board 11, a board having the same configuration as that described in Design Registration No. 1376897 as described above has been described. However, the form of the boat 11 is not limited to this, and may be, for example, the configuration described in Patent Document 1. The front and rear tracks 14 and 15 have also been described for the specific configuration shown, but are not limited to this, and are widely used for ordinary skateboards equipped with a plate-shaped board and four wheels. Base plates 21, hangers 24, bushes 25, and 26 having the same configuration as those used above can be appropriately used. Further, in the illustrated example, the bushes 25 and 26 have the same configuration as those widely used for a normal skateboard having a plate-shaped board and four wheels as described above, but are limited thereto. It is also possible to use an appropriate member having spring elasticity as the bushes 25 and 26. Further, in the illustrated example, a pair of bushes 25 and 26 are arranged above and below the same as those widely used for a normal skateboard having a plate-shaped board and four wheels. The quantity and form thereof are not limited to the above. In short, a configuration in which a member having spring elasticity is attached between the base plate 21 attached to the thrust bearings 16 and 17 and the hanger 24 using a kingpin 22 is sufficient. As the kingpin 22, an appropriate one can be used instead of the configuration shown in the figure.

(Embodiment 2)
8 and 9 show a skateboard according to a second embodiment of the present invention. In the second embodiment, in the rear truck 15, the hanger 24 is directly attached to the board 11 by the kingpin 22 without using the base plate 21 or the thrust bearing 17. Although not shown, the boat 11 is provided with metal fittings and other members for screwing the kingpin 22. The upper bush 25 is provided between the hanger 24 and the seat plate 31, and the lower bush 26 is provided between the hanger 24 and the kingpin nut 23.

With such a configuration, the hanger 24 directly attached to the board 11 can rotate around the axis 19, but the magnitude of the rotation resistance is adjusted by the tightening degree of the kingpin nut 23. Therefore, the rotational resistance of the rear truck 15 can be easily adjusted. Moreover, since it does not have a base plate or thrust bearing, the structure is simple accordingly.

The skateboard of the second embodiment is not limited to the illustrated example as in the skateboard of the first embodiment described above, and various modified structures similar to the above can be adopted.

(Embodiment 3)
10 to 12 show a skateboard according to a third embodiment of the present invention. In this skateboard, the board 11 is formed of a plate-like body as shown in the drawing, and the front side portion 12 and the rear side portion 13 of the board 11 are in the front-rear direction depending on the weight and leg strength of the operator. It is configured to have a rigidity that cannot be elastically twisted and deformed in opposite directions around the axis.

The structure of the front truck 14 is as follows. That is, a plate-shaped bracket 35 in the shape of a dogleg is attached to the lower surface of the front side portion 12 of the board 11, and the front half portion 36 of the bracket 35 is gradually lowered toward the front side of the board 11. It is tilted so that That is, the front half portion 36 is formed so that the plate surface 37 faces diagonally backward and downward.

In the third embodiment, a thrust bearing 16 as a support that rotatably supports the base plate 21 of the front truck 14 is attached to the front half portion 36 of the bracket 35 by bolts 38 and nuts 39. A first synthetic rubber plate 40 is sandwiched between the thrust bearing 16 and the bracket 35 as an elastic body having spring elasticity, and is integrally attached to the first synthetic rubber plate 40. Further, a second synthetic rubber plate 42 is sandwiched between the washer 41 on the nut 39 side and the bracket 35 as an elastic body having spring elasticity, and is integrally attached to these. That is, the thrust bearing 16 as a support is attached to the bracket 35 in a state where the bracket 35 is sandwiched between the first synthetic rubber plate 40 and the second synthetic rubber plate 42. As described above, since the bracket 35 is formed so that the plate surface 37 of the front half portion 36 faces diagonally rearward and downward, the thrust bearing 16 attached to the front half portion 36 has an axial center 18 of the bracket 35. Similar to the first and second forms, it has a structure that is inclined forward.

In the front track 14, the base plate 21, the hanger 24, the bushes 25, 26, the kingpin 22, the kingpin nut 23, and the like have the same configurations as those of the first and second embodiments. These are also provided in the rear truck 15. Then, in the rear truck 15, the base plate 21 is directly attached to the board 11. Its mounting structure is similar to that widely used for ordinary skateboards with plate-shaped boards and four wheels. Therefore, the detailed illustration thereof will be omitted.

In the skateboard of the third embodiment, when the operator rides on the board 11 and tilts the entire board 11 in either the left or right direction due to the weight or leg strength, the front track 14 is around the axis 18 inclined forward. Since it is configured to rotate to the right, it turns to the right or to the left according to the inclination of the board 11. As a result, the operator can steer the board 11 and exert a propulsive force on the board 11. The rear truck 15 does not have thrust bearings and therefore does not have such a turning function. However, since the bushes 25 and 26 are provided, the rear portion 13 of the boat 11 can be inclined in a narrow range without difficulty.

As described above, in the skateboard of the third embodiment, the rigidity of the board 11 is higher than that of the first and second embodiments, and the front side portion 12 and the rear side portion 13 are axes in the front-rear direction depending on the weight and leg strength of the operator. It does not elastically twist and deform around the heart in opposite directions. However, since not only the bushes 25 and 26 but also the first and second synthetic rubber plates 40 and 42 having spring elasticity are provided between the board 11 and the hanger 24, the rigidity of the board 11 is high. Nevertheless, the operator can flexibly and smoothly displace the board 11 when it is swiveled or propelled, as in the first and second embodiments. Therefore, even with the skateboard of the third embodiment, since it is configured to have four front and rear wheels, it is not only excellent in stability during running, particularly stability at the start of running, but also propulsion operability and particularly turning operability. Can be exceptionally good. Not only that, because the board 11 has high rigidity, the operator can ride on the board 11 in a stable state.

In other words, in the skateboard of the third embodiment, the rigidity of the board 11 is higher than that of the skateboards of the first and second embodiments, and the turning operability of the front truck 14 is particularly improved by inclining the board 11 by that amount. Although it tends to be lower, it can be said that the tendency is compensated for by the first and second synthetic rubber plates 40 and 42 having spring elasticity.

Therefore, the spring elasticity of the first and second synthetic rubber plates 40 and 42 contributes to the steerability and propulsive force generation of the front track 14 by inclining the board 11 around the front-rear axial center. It is preferably about the same. From this viewpoint, as shown in the drawing, it is preferable that the lower first synthetic rubber plate 40 is formed thicker than the upper second synthetic rubber plate 42. Further, it is preferable that the lower first synthetic rubber plate 40 is formed to have a larger surface direction than the upper second synthetic rubber plate 42. Specifically, it is preferably formed with a large diameter. Further, since the board 11 is inclined in the left-right direction, it is preferable that the first synthetic rubber plate 40 on the lower side has a shape having a larger dimension in the left-right direction than in the front-rear direction. Examples of such a shape include an ellipse and a rectangle. In the attached drawings, an elastic body, that is, two synthetic rubber plates are used as an example, but the number thereof can be adjusted as appropriate.

11 Board 14 Front truck 15 Rear truck 16 Thrust bearing 17 Thrust bearing 18 Axis center 19 Axis center 21 Base plate 22 Kingpin 24 Hanger 25 Bush 26 Bush 40 First synthetic rubber plate 42 Second synthetic rubber plate

Claims (5)

A skateboard with a front track and a rear track
The front track and the rear track each include a base plate, a hanger, a kingpin for attaching the hanger to the base plate, and a bush with spring elasticity.
The bush is arranged coaxially with the kingpin.
The base plate of the front track is rotatable around a first axis that is tilted forward.
A skateboard characterized in that the axis of the kingpin of the front track is inclined forward. The base plate of the rear truck is rotatable around a second axis that is tilted forward.
The skateboard according to claim 1, wherein the axis of the kingpin of the rear truck is inclined forward. A board having a front side portion and a rear side portion is provided, and the front side portion and the rear side portion are elastically twisted and deformed in opposite directions around an axial center in the front-rear direction due to the weight and leg force of the operator. The skateboard according to claim 1 or 2, which is configured to be capable. A board having a front side portion and a rear side portion is provided, and the front side portion and the rear side portion are elastically twisted around an axial center in the front-rear direction in opposite directions depending on the weight and leg strength of the operator. The skateboard according to claim 1 or 2, which is configured so as not to be deformed. The front track does not have a restoring spring to restore the base plate to a neutral position where it does not swing from side to side.
The skateboard according to any one of claims 1 to 4, wherein the rear track has a restoring spring for restoring the base plate to a neutral position where it does not swing to the left or right.