JP7242152B1 - Rotation retention mechanism for foldable wheel and bicycle provided with the same - Google Patents

Abstract

A mechanism capable of suitably holding collapsible wheels that can be divided into a plurality of parts to be made compact in a given moving body structure, and a bicycle that can be compactly folded and easily transported using the mechanism. . In a rotation holding mechanism for a collapsible wheel disclosed in the present disclosure, a front wheel (31) and a rear wheel (32) of a collapsible wheel (3) are configured to be divisible into a plurality of arcuate pieces, and the pieces are divided into a plurality of arcuate pieces. are configured to be connectable by a fastening screw 300 . The rotation holding mechanism 2 for rotating and holding the foldable wheels includes a front wheel rotation holding part 21 arranged at the front end of the frame 4 and holding the front wheel 31 to rotate, and a rear wheel 32 arranged at the rear end of the frame 4. and a rear wheel rotation holding unit 22 that holds the rotation of the rear wheel 32 and drives the rear wheel 32 . [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a foldable wheel rotation holding mechanism for rotating and holding a foldable wheel that can be divided into a plurality of parts, and a bicycle equipped with the same.

2. Description of the Related Art Conventionally, bicycles have been widely used that can be made compact and carried by making the frame foldable.

In addition, for folding bicycles that can be folded compactly, a technique for folding the wheels has been developed so that the volume of the bicycle wheels can be reduced so that the bicycle can be easily transported.

For example, Patent Literature 1 discloses a collapsible wheel for a bicycle that can be folded linearly into an elongated shape. In this technology, the spokes of the wheel are composed of fixed spokes fixed to the hub and movable spokes that are freely rotatable, and the split rim and tire are connected to the spokes to make the wheel elongated. can be folded.

JP-A-2005-212675

Conventionally widely used folding bicycles mainly have a structure in which the frame can be folded, and the wheels cannot be folded, so that the bicycle cannot be sufficiently compacted when folded. On the other hand, according to the technology described in Patent Literature 1, the wheels can be folded into a long and narrow state, which seems to contribute to the compactness of folding bicycles. However, in the technique described in Patent Document 1, the wheel is folded while the split rim and tire are connected to the spokes, so the overall length of the folded wheel becomes long.

Therefore, it is conceivable to configure the wheel without providing spokes so that the wheel can be divided into a plurality of parts and can be folded freely. However, in this case, the wheel cannot be held via the hub or the spokes that connect the hub and the rim. can be difficult.

The purpose of the present disclosure is to provide a mechanism capable of suitably holding collapsible wheels that can be divided into a plurality of parts to be made compact in a given moving body structure, and a bicycle that can be compactly folded and easily transported using the mechanism. is to provide

A rotation holding mechanism for a collapsible wheel according to the present disclosure is a mechanism for holding a rotation of a collapsible wheel configured to be divided into a plurality of pieces. In this rotation retaining mechanism for a foldable wheel, the foldable wheel is a wheel composed of a rim and a tire, and includes front wheels and rear wheels arranged in front and rear of a frame of a predetermined moving body. Each of the front wheel and the rear wheel is configured to be divisible into a plurality of arc-shaped pieces, and the pieces are configured to be connectable by a predetermined fastening means. The rotation holding mechanism for holding rotation of the foldable wheels includes a front wheel rotation holding portion arranged at the front end of the frame for holding rotation of the front wheel, and a rear wheel arranged at the rear end of the frame for holding the rear wheel. A rear wheel rotation holding section for holding rotation, and a rear wheel rotation holding section for driving the rear wheel.

In the rotation retaining mechanism for the above foldable wheel, the wheel, which is sufficiently compacted by being divided into a plurality of arc-shaped pieces, is moved through the hub and the spokes that connect the hub and the rim during running. Although it cannot be held, it can be preferably held in rotation by the frame using the front wheel rotation holding portion and the rear wheel rotation holding portion. As a result, the collapsible wheel that can be divided into a plurality of parts to make it compact can be suitably held on the frame when traveling, and can be folded compactly when transported.

Here, in the rotation retaining mechanism for a collapsible wheel of the present disclosure, in the above configuration, the front wheel rotation retaining portion contacts the inner peripheral surface of the rim of the front wheel and rotates around a predetermined first fixed axis. and a first holding portion that rotationally holds the rim by rotationally holding the tire by rotationally holding the tire by rotationally moving about a predetermined second fixed axis while contacting the outer peripheral surface of the tire of the front wheel. and a third holding portion that holds the tilt of the rim by rotationally moving about a predetermined third fixed axis while contacting the side surface of the rim of the front wheel. good too. The rear wheel rotation holding portion rotationally holds the rim by rotationally moving about a predetermined fourth fixed shaft while meshing with a gear portion formed on the inner peripheral surface of the rim of the rear wheel. a fourth holding portion for driving the rear wheel through the gear portion; and a fourth holding portion for rotating the rear wheel around a predetermined fifth fixed shaft while contacting the outer peripheral surface of the tire to hold the tire in rotation. and a sixth holding portion that holds the tilt of the rim by rotationally moving about a predetermined sixth fixed axis while contacting the side surface of the rim of the rear wheel. good too. According to this, even if the wheel does not have a hub and spokes, it is possible to restrain the movement in the radial direction and the movement in the width direction of the wheel, thereby holding the wheel on the bicycle frame or the like. can do.

In such a foldable wheel rotation holding mechanism, the first holding portion has a first rotating roller that rotates while contacting the inner peripheral surface of the rim around the first fixed shaft as a central axis, The first rotating roller may be formed of a resin bearing in which a resin material is filled with a solid lubricant. According to this, good slidability with respect to the inner peripheral surface of the rim can be realized, and a relatively large load can be supported.

The present disclosure can also be viewed from the side of a bicycle with a swivel wheel rotation retention mechanism. That is, the bicycle of the present disclosure is a bicycle provided with the rotation holding mechanism for the universal wheel.

In this case, in the above bicycle, the front wheel rotation holding portion may have two sets of the first holding portion and the second holding portion for restraining radial movement of the front wheel. good. According to this, it is possible to stably hold the front wheel of the bicycle in which the front wheel is steered. Further, in the above bicycle, the rear wheels are driven by two of the rear wheel rotation holding portions, and the fourth gears included in the fourth holding portions of the two rear wheel rotation holding portions include: A fourth gear rotating while meshing with the gear portion formed on the inner peripheral surface of the rim around the fixed shaft 4 may be connected by an idle gear. According to this, since the rear wheels can be driven by the two fourth gears, it is possible to reduce the load per tooth in the meshing of the gears, and it is possible to transmit the drive torque more preferably to the rear wheels. become.

INDUSTRIAL APPLICABILITY According to the present disclosure, a mechanism capable of suitably holding collapsible wheels that can be divided into a plurality of parts to be made compact in a given moving body structure, and a bicycle that can be compactly folded and easily transported using the mechanism can be provided.

1 is a diagram showing a schematic configuration of a bicycle provided with a mechanism for holding rotation of foldable wheels according to the first embodiment; FIG. 1 is a diagram showing a schematic configuration of a conventional folding bicycle; FIG. It is a figure for demonstrating the folding structure of the bicycle in 1st Embodiment. It is a figure for demonstrating the connection structure of the wheel in 1st Embodiment. It is a figure for demonstrating the function of the front wheel rotation holding|maintenance part in 1st Embodiment. It is a figure for demonstrating the function of the rear wheel rotation holding|maintenance part in 1st Embodiment. It is a figure for demonstrating the rear wheel rotation holding|maintenance part in 2nd Embodiment.

Embodiments of the present disclosure will be described below based on the drawings. The configurations of the following embodiments are examples, and the present disclosure is not limited to the configurations of the embodiments.

<First Embodiment>
An outline of a rotation holding mechanism for a foldable wheel and a bicycle including the same according to the first embodiment will be described with reference to FIG. FIG. 1 is a diagram showing a schematic configuration of a bicycle provided with a rotation holding mechanism for foldable wheels according to this embodiment. A bicycle 1 according to the present embodiment is a bicycle provided with a rotation holding mechanism 2 for holding rotation of a foldable wheel that can be divided into a plurality of pieces.

As shown in FIG. 1 , the bicycle 1 has wheels 3 including a front wheel 31 and a rear wheel 32 . Specifically, a front wheel 31 arranged in front of the frame 4 is rotatably held by a front wheel rotation holding part 21 arranged at the front end of the frame 4, and a rear wheel 32 arranged behind the frame 4 is held by the frame. 4 is rotated and held by a rear wheel rotation holding portion 22 arranged at the rear end portion.

Here, the bicycle 1 according to the present embodiment will be described in comparison with a conventional bicycle 1', which is a folding bicycle in which only the frame can be folded.

A conventional bicycle 1' comprises a frame 4' similar to the bicycle 1 of the present disclosure, as shown in FIG. FIG. 2 is a diagram showing a schematic configuration of a conventional folding bicycle.

The frame 4' then has hinges 41' that allow folding of the frame. Then, as shown in FIG. 2(b) showing the bicycle in a folded state, the front portion of the bicycle 1' is folded rearward.

Folding the frame 4' in this way can contribute to easy transportation of the bicycle 1'. However, in such a conventional folding bicycle, the frame is mainly of a structure that can be folded, and the wheels cannot be folded, so that the bicycle cannot be made sufficiently compact when folded.

On the other hand, in the bicycle 1 according to the present embodiment, not only the frame can be folded like a conventional folding bicycle, but also the wheels can be folded. This allows the bicycle to be sufficiently compact when folded. This will be described with reference to FIG.

FIG. 3 is a diagram for explaining the folding structure of the bicycle 1 according to this embodiment. In the bicycle 1 of this embodiment, as shown in FIG. 3(a), the wheel 3 is configured as a foldable wheel that can be divided into a plurality of parts. In this embodiment, the front wheel 31 is separable into arcuate pieces 31a, 31b, and 31c, and the rear wheel 32 is separable into arcuate pieces 32a, 32b, and 32c. When the bicycle 1 is folded, the front wheel 31 and the rear wheel 32 are each divided into a plurality of arcuate pieces as shown in FIG. 3(a). In the state in which the wheel 3 is thus divided into a plurality of pieces, the piece 31a is fixed to the frame 4 by the front wheel rotation holding portion 21, and the piece 32a is fixed to the frame 4 by the rear wheel rotation holding portion 22. . Moreover, as will be described later, these pieces are configured to be connectable/disassembleable by predetermined fastening means.

In addition, in the wheel 3 configured as a foldable wheel that can be divided into a plurality of parts in this way, the tire is formed solid from a rubber material. That is, the tires of the wheels 3 are not filled with air. Therefore, even if the wheel 3 is divided into a plurality of parts, there is no risk of air leakage.

Then, as shown in FIG. 3(b), the front portion of the bicycle 1 is folded rearward by the hinges 41 provided on the frame 4. As shown in FIG. At this time, the piece 31 a is fixed to the frame 4 by the front wheel rotation holding portion 21 , and the piece 32 a is fixed to the frame 4 by the rear wheel rotation holding portion 22 .

The remaining pieces (pieces 31b, 31c, 32b, 32c) of the divided wheel 3 can be fixed to the frame 4 by attachments 42 provided on the frame 4. As shown in FIG. The pedal portion of the bicycle 1 may also be configured to be foldable (illustration of the folding structure of the pedal portion is omitted).

According to the folding structure of the bicycle 1 described above, the bicycle can be made sufficiently compact when folded.

The wheel 3, which is configured as a foldable wheel that can be divided into a plurality of parts, is configured to be connectable/disassembleable by a predetermined fastening means. Here, FIG. 4 is a diagram for explaining the connection structure of the wheels 3 in this embodiment. In this embodiment, as shown in FIG. 4 , a piece of the wheel 3 is fastened with a fastening screw 300 . A threaded hole is formed on the end side of each piece on the rim of the wheel 3, and the piece is fastened by a fastening screw 300 through the threaded hole so that the piece is attached to the wheel. 3 are concatenated. Further, the wheel 3 is disassembled into pieces by removing the fastening screw 300 .

In this way, a bicycle equipped with foldable wheels that can be divided into a plurality of parts can be made sufficiently compact when the bicycle is folded. However, with the collapsible wheel described above, the wheel cannot be held through the hub or the spokes that connect the hub and the rim while the bicycle is running, so it can be difficult to hold the wheel on the bicycle frame.

Therefore, in the bicycle 1 of this embodiment, the front wheel rotation holding portion 21 rotates about the first fixed shaft 211b while contacting the inner peripheral surface of the rim 310b of the front wheel 31, thereby rotating the rim 310b. and a second holding portion 212 that rotationally holds the tire 310a by rotationally moving about the second fixed shaft 212b while contacting the outer peripheral surface of the tire 310a of the front wheel 31. and a third holding portion 213 that rotates around a third fixed shaft 213b while contacting the side surface of the rim 310b of the front wheel 31 to hold the rim 310b from falling.

Here, FIG. 5 is a diagram for explaining the function of the front wheel rotation holding section 21 in this embodiment. As shown in FIG. 5, the front wheel rotation holding portion 21 has a first holding portion 211, a second holding portion 212, and a third holding portion 213, so that the wheel does not have a hub and spokes. Even in such a case, the radial movement and widthwise movement of the wheel can be restrained, so that the wheel can be held on the frame of the bicycle.

As shown in FIG. 5(a), the bicycle 1 according to the present embodiment includes a first holding portion 211 and a second holding portion 212 that restrain the front wheel 31 from moving in the radial direction. and two pairs. That is, the front wheel rotation holding portion 21 in this embodiment includes two pairs of first holding portion 211 and second holding portion 212, and one set of third holding portion 213 (the third holding portion 213 is hold the rim 310b of the front wheel 31 from both sides as a set). Furthermore, as one structure, specifically, the first holding portion 211 and the second holding portion 212 arranged in four directions with respect to the third holding portion 213 are configured to hold the third holding portion 213. These are connected to the center and arranged on both sides of the front wheel 31 and are connected to the frame 4 to form one structure. As a result, in the bicycle 1 in which the front wheel 31 is steered, the front wheel 31 can be stably held, and the holding structure can be made compact.

Regarding the front wheel rotation holding portion 21, as shown in FIGS. It comprises a shaft and a rotating roller. 5(b) is a projection view from arrow b in FIG. 5(a), and FIG. 5(c) omits the wheels 3 in FIG. 5(b) and enlarges each holding portion. is shown. In the first holding portion 211, the first rotating roller 211a rotates around the first fixed shaft 211b while contacting the inner peripheral surface of the rim 310b. Rotates around the fixed shaft 212b while contacting the outer peripheral surface of the tire 310a. In the third holding portion 213, the third rotating roller 213a rotates around the third fixed shaft 213b while contacting the side surface of the rim 310b. do.

The first rotating roller 211a that rotates while contacting the inner peripheral surface of the rim 310b can be formed of a resin bearing in which a solid lubricant is filled in a rubber material or a resin material. Here, the above resin bearing is, for example, an engineering plastic such as polyacetal or polyphenylene sulfide filled with a solid lubricant such as fluororesin, and has good slidability with the inner peripheral surface of the rim 310b. While being realized, it can support a relatively large load.

The second rotating roller 212a that rotates while contacting the outer peripheral surface of the tire 310a is made of a metal material such as aluminum, and the third rotating roller 213a that rotates while contacting the side surface of the rim 310b is made of a rubber material. can be

Furthermore, in the bicycle 1 of this embodiment, the rear wheel rotation holding portion 22 rotates around the fourth fixed shaft 224b while meshing with the gear portion formed on the inner peripheral surface of the rim 320b of the rear wheel 32. As a result, a fourth holding portion 224 that holds the rim 320b in rotation and drives the rear wheel 32 via the gear portion and a fifth fixed shaft 225b while contacting the outer peripheral surface of the tire 320a of the rear wheel 32. A fifth holding portion 225 that rotates and holds the tire 320a by rotating the tire 320a, and a fifth holding portion 225 that rotates about a sixth fixed shaft 226b while contacting the side surface of the rim 320b of the rear wheel 32 to tilt the rim 320b. and a sixth holding portion 226 that holds the .

Here, FIG. 6 is a diagram for explaining the function of the rear wheel rotation holding section 22 in this embodiment. As shown in FIG. 6( a ), the rear wheel rotation holding portion 22 has a fourth holding portion 224 , a fifth holding portion 225 and a sixth holding portion 226 so that the wheel can be held between the hub and the spokes. Even if it is not provided, it is possible to restrain the radial movement and the widthwise movement of the wheel in the same way as the front wheel rotation holding part 21, thereby holding the wheel on the frame of the bicycle. can be done.

In addition, in the rear wheel rotation holding portion 22, the fifth holding portion 225 and the sixth holding portion 226 are provided with the fifth rotating roller 225a, similarly to the second holding portion 212 and the third holding portion 213 of the front wheel rotation holding portion 21. and a sixth rotating roller 226a.

On the other hand, in the fourth holding portion 224 of the rear wheel rotation holding portion 22, the fourth gear 224a rotates around the fourth fixed shaft 224b while meshing with the gear portion formed on the inner peripheral surface of the rim 320b. The rim 320b is held to rotate and the rear wheel 32 is driven through the gear portion.

Here, as shown in FIG. 6B, the fourth holding portion 224 is coaxially connected to a sprocket connected to a chain that transmits pedal torque, and a fourth gear 224a is coaxial with the sprocket. Rotate. Thereby, the pedal torque can be transmitted to the rear wheels 32 . For the sake of explanation, in FIG. 6B, illustration of the teeth of the gears and sprockets, the detailed shape of the frame 4, etc. is omitted.

According to the bicycle 1 described above, the collapsible wheels, which can be divided into a plurality of parts to make it compact, can be suitably held by the frame during running, and can be folded compactly during transportation.

<Second embodiment>
The rear wheel rotation holding portion 22 in the second embodiment will be described with reference to FIG. FIG. 7 is a diagram for explaining the rear wheel rotation holding portion 22 in this embodiment.

As shown in FIG. 7 , in the bicycle 1 according to this embodiment, the rear wheel 32 is rotationally held and driven by two rear wheel rotation holding portions 22 .

The fourth gears 224 a of the fourth holding portions 224 of the two rear wheel rotation holding portions 22 are connected by an idle gear 2241 . Note that the idle gear 2241 is fixed to the rear end portion of the frame 4 in the same manner as the rear wheel rotation holding portion 22 .

According to this, since the rear wheel 32 can be driven by the two fourth gears 224a, the load per tooth in the meshing of the gears can be reduced, and the pedal torque can be transmitted more favorably to the rear wheel 32. it becomes possible to

With the bicycle 1 described above, the foldable wheels, which can be divided into a plurality of parts to make it compact, can be suitably held on the frame when traveling, and can be folded compactly when transported.

1 Bicycle 2 Rotation Holding Mechanism 21 Front Wheel Rotation Holding Part 22 Rear Wheel Rotation Holding Part 3 Wheel 31 Front Wheel 32... Rear wheel 300... Fastening screw 4... Frame

Claims (6)

A rotation holding mechanism for a foldable wheel that rotates and holds a foldable wheel that can be divided into a plurality of parts,
The collapsible wheels are
A wheel composed of a rim and a tire, comprising a front wheel and a rear wheel arranged in front and rear of a frame of a predetermined moving body,
The front wheel and the rear wheel are each configured to be divisible into a plurality of arc-shaped pieces, and the pieces are configured to be connectable by a predetermined fastening means,
The rotation holding mechanism for holding the foldable wheel in rotation,
a front wheel rotation holding part arranged at the front end of the frame and holding the rotation of the front wheel;
a rear wheel rotation holding portion arranged at the rear end portion of the frame for holding the rear wheel in rotation, and further comprising a rear wheel rotation holding portion for driving the rear wheel;
Rotation holding mechanism of the collapsible wheel. The front wheel rotation holding part is
a first holding portion that rotationally holds the rim of the front wheel by rotationally moving around a predetermined first fixed axis while being in contact with the inner peripheral surface of the rim of the front wheel;
a second holding portion that rotationally holds the tire by rotationally moving around a predetermined second fixed axis while contacting the outer peripheral surface of the tire of the front wheel;
a third holding portion that holds the tilt of the rim by rotationally moving about a predetermined third fixed axis while contacting the side surface of the rim of the front wheel;
The rear wheel rotation holding part is
The rear wheel rotates around a predetermined fourth fixed shaft while meshing with a gear formed on the inner peripheral surface of the rim, thereby holding the rim in rotation and rotating the rear wheel via the gear. a fourth holding part to be driven;
a fifth holding portion that rotationally holds the tire by rotationally moving about a predetermined fifth fixed axis while being in contact with the outer peripheral surface of the tire of the rear wheel;
a sixth holding portion that holds the tilt of the rim by rotationally moving around a predetermined sixth fixed axis while contacting the side surface of the rim of the rear wheel;
2. A rotation retaining mechanism for a collapsible wheel according to claim 1. The first holding part has a first rotating roller that rotates about the first fixed shaft as a central axis while contacting the inner peripheral surface of the rim,
The first rotating roller is formed by a resin bearing in which a resin material is filled with a solid lubricant,
3. A mechanism for retaining rotation of a collapsible wheel according to claim 2. A bicycle comprising the rotation retaining mechanism for a foldable wheel according to claim 2 or 3. The front wheel rotation holding part is
Having two sets of the first holding portion and the second holding portion that constrain the radial movement of the front wheel,
A bicycle according to claim 4. The rear wheels are driven by two of the rear wheel rotation holding units,
A fourth gear included in each of the fourth holding portions of the two rear wheel rotation holding portions rotates about the fourth fixed shaft as a central axis while meshing with the gear portion formed on the inner peripheral surface of the rim. the fourth gear is connected by the idle gear,
A bicycle according to claim 4.

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