JP2010030567A - Wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheel contributing to miniaturization of a mounted body. <P>SOLUTION: This invention relates to the wheel 1 with a tube type tire 4 attached to a wheel 2. The valve 301 of the tube 3 of the wheel 1 is guided to the surface side of the wheel 2 outside the wheel 2. Owing to such constitution, the valve 3 is not protruded to the inside of the wheel 2. That prevents the occurrence of a dead space inside the wheel 2. Thus, a driving device 5 can be arranged inside the wheel 2 substantially without a clearance, and the entire of the mounted body (for instance, a wheel type robot, a coaxial motorcycle, and a power wheelchair) with the wheel 1 attached thereto can be miniaturized. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wheel in which a tube type tire is mounted on a wheel.

Pneumatic tires have excellent characteristics in terms of vibration absorption, envelope characteristics, and running resistance. As disclosed in Non-Patent Document 1, a wheel to which a tube type tire that is a kind of pneumatic tire is mounted has a through hole for passing a valve of the tube in the rim portion of the wheel. The valve is supported through the through hole. Therefore, the valve is erected inside the wheel.
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  The wheel of Non-Patent Document 1 is required to have a configuration that does not interfere with a drive device, a brake, or the like disposed around the valve when the valve standing inside the wheel rotates together with the wheel. That is, it is necessary to leave the periphery of the rotation region of the valve, and a dead space is generated inside the wheel. Therefore, when the wheel in which the tube-type tire is mounted on the wheel of Non-Patent Document 1 is attached to an attached body such as a vehicle, the entire attached body is enlarged.

Of course, the same problem arises even if a wheel in which a tube-type tire is mounted on a wheel of Non-Patent Document 1 is attached to a wheeled robot, a coaxial two-wheeled vehicle, an electric wheelchair, or the like as an attached body.
An object of this invention is to provide the wheel which contributes to size reduction of a to-be-attached body.

  The wheel of the present invention is a wheel in which a tube type tire is mounted on the wheel, and the valve of the tube is guided to the surface side of the wheel outside the wheel. With such a configuration, the valve does not protrude into the wheel. Therefore, no dead space is generated inside the wheel. Therefore, the drive device can be arranged inside the wheel without a substantial gap, and the entire attached body to which the wheel is attached can be downsized.

  A guide groove that guides the valve of the tube toward the surface side of the wheel is formed in the outer surface portion of the wheel, and the valve of the tube is guided to the surface side of the wheel by the guide groove. It is preferable. With such a configuration, since the valve of the tube is guided to the surface side from the guide groove formed in the outer peripheral portion of the wheel, the valve does not protrude into the wheel.

  It is preferable that the guide groove is formed so as to be inclined toward the surface side of the wheel and toward the central axis of the wheel.

  The guide groove is preferably formed substantially horizontally in the rim portion of the wheel.

  The disc portion of the wheel is formed with a recessed portion for storing the valve so as to be continuous from the guide groove, and the valve of the tube bent in the middle has the recessed portion at the tip of the bent portion. It is preferable that it is stored in the section. With such a configuration, the protruding amount of the tube valve can be reduced.

  The wheel includes a first wheel forming a front flange portion, and a second wheel in which a rear flange portion, a rim portion, and a disc portion are integrally formed, and the rim portion and the disc of the second wheel. It is preferable that the guide groove is formed in the outer surface portion of the portion. Since the wheel has a two-piece structure, it can be easily assembled while guiding the valve to the surface side of the wheel. Further, since the valve is guided to the surface side of the wheel outside the wheel, the tube can be easily replaced by simply removing the first wheel.

  It is preferable that a connecting portion between the rim portion and the disk portion is a thick portion, and the guide groove is formed in the thick portion. With such a configuration, since the guide groove is formed by effectively using the thick part of the wheel, the guide groove is well-fitted and functional.

  The rim inner diameter of the wheel is preferably substantially equal to the outer diameter of a driving device such as a wheeled robot, a coaxial two-wheeled vehicle, or an electric wheelchair.

  It is preferable that a hole for exposing the valve tip of the tube is formed in the side wall of the tire, and the valve tip is guided in the hole.

  The wheel which concerns on this invention can contribute to size reduction of a to-be-attached body.

  Hereinafter, embodiments of a wheel according to the present invention will be described in detail based on the drawings. However, the present invention is not limited to the following embodiments. In addition, for clarity of explanation, the following description and drawings are simplified as appropriate. Incidentally, the wheel of this embodiment is a wheel in which a tube type tire is attached to the wheel, and is suitably used for a wheeled robot, a coaxial two-wheeled vehicle, an electric wheelchair, or the like.

  As shown in FIGS. 1 and 2, the wheel 1 includes a wheel 2, a tube 3, and a tire 4. The wheel 2 includes a first wheel 201 and a second wheel 202. The first wheel 201 is a hollow disk member that forms the flange portion 2a on the front side of the wheel 2, and is a molded product such as a resin. The flange portion 2 a has a height sufficient to support the side wall of the tire 4 attached to the wheel 2. The first wheel 201 has a bolt hole 201 a through which the bolt 203 is passed. Further, the first wheel 201 is formed with a notch 201b for exposing the valve 301 of the tube 3 protruding outward.

  As shown in FIG. 3, the second wheel 202 includes a flange portion 2b, a rim portion 2c, and a disk portion 2d on the back side, and is an integrally molded product such as a resin. The flange portion 2 b has a height sufficient to support the side wall of the tire 4 attached to the wheel 2. The rim portion 2 c is a circular cylindrical member, has an inner diameter that allows the drive device 5 to be fitted therein, and has a rim width that is suitable for the tire 4 attached to the wheel 2. A flange 2b is formed so as to be continuous from the peripheral edge on the back surface side of the wheel 2 in the rim portion 2c. On the other hand, a disk portion 2d is formed so as to be continuous from the peripheral edge on the surface side of the wheel 2 in the rib portion 2c. The disk portion 2d is a flat plate member, and a bolt hole 202a is formed at a position corresponding to the bolt hole of the drive device 5 so as to be bolted to the drive device 5 fitted in the rim portion 2c. Further, a stepped portion 202b into which the hollow portion 201c of the first wheel 201 is fitted is formed on the surface portion of the disc portion 2d. A screw hole 202c for the bolt 203 is formed in the stepped portion 202b at a position corresponding to the bolt hole 201a of the first wheel 201. That is, the hollow portion 201c of the first wheel 201 is fitted into the stepped portion 202b of the second wheel 202, and the bolt 203 is screwed into the bolt hole 201a and the screw hole 202c arranged concentrically. Are connected.

  Guide grooves 2e for guiding the valve 301 of the tube 3 to the surface side of the wheel 2 are formed on the outer surface portions of the rim portion 2c and the disk portion 2d. The guide groove 2e has a depth sufficient to accommodate the valve 301. The tip of the valve 301 guided to the surface side of the wheel 2 by the guide groove 2e is exposed from the notch 201b of the first wheel 201 connected to the second wheel 202.

  In the present embodiment, as shown in FIG. 2, the connecting portion between the rim portion 2 c and the disc portion 2 d is a thick portion and reinforced to ensure rigidity as the wheel 2. Therefore, in order to use this thick portion effectively, the guide groove 2e is formed in the thick portion so as to be inclined toward the surface side of the wheel 2 and toward the central axis of the wheel 2. Further, a screw hole 202c of a bolt 203 is formed in this thick portion. Therefore, it is preferable that the thick portion has a thickness and a shape that can form the guide groove 2e and can form the screw hole 202c of the bolt 203. Since the guide groove 2e and the screw hole 202c are formed by effectively using the thick portion in this way, the guide groove 2e and the screw hole 202c are well-contained and functional.

  The tube 3 includes a valve 301 and a tube main body 302. The valve 301 can employ a valve structure such as a shredder valve, as in a normal tube type tire. The valve 301 is guided from the guide groove 2 e of the wheel 2 to the surface side of the wheel 2. That is, the valve 301 is guided to the surface side of the wheel 2 outside the wheel 2.

  The tube main body 302 has a donut-shaped sealing structure having an inner periphery substantially equal to the outer periphery of the rim of the wheel 2, and a valve 301 is connected so as to maintain the sealing structure. The tube body 302 is made of butyl rubber, latex, polyurethane, or the like. The tube body 302 is disposed on the outer periphery of the wheel 2 so that the valve 301 can be satisfactorily accommodated in the guide groove 2e of the wheel 2.

  The tire 4 is sized to fit the rim width of the wheel 2 and the outer periphery of the rim. The tire 4 is incorporated in the outer periphery of the rim portion 2c in a form in which the tube main body 302 is housed between the front flange 2a and the rear flange 2b of the wheel 2.

  In the wheel 1 having such a configuration, the valve 301 of the tube 3 is guided to the surface side from the guide groove 2 e formed in the outer peripheral portion of the wheel 2, so that the valve 301 does not protrude into the wheel 2. Therefore, no dead space is generated inside the wheel 2. Therefore, as shown in FIG. 4, the drive device 5 can be disposed inside the wheel 2 without a substantial gap, and the entire attached body to which the wheel 1 is attached can be downsized. In particular, wheel robots, coaxial two-wheeled vehicles, electric wheelchairs, and the like are highly demanded for miniaturization, and thus the effect is remarkable. The driving device 5 is composed of, for example, a motor and a speed reducer. However, this is not the case.

  Moreover, since the valve 301 is exposed on the surface side of the wheel 2, the air pressure can be adjusted easily and quickly.

  Incidentally, in the valve 301, it is preferable that a portion of the guide groove 2e protruding from the end portion on the surface side of the wheel 2 is bent in the horizontal direction, that is, substantially parallel to the disk portion 2d of the wheel 2. The amount of protrusion that the valve 301 protrudes to the surface side of the wheel 2 can be reduced, and the valve 301 is less likely to come into contact with other members during traveling. At this time, as shown in FIG. 3, the disc portion 2d of the wheel 2 is formed with a recess 2f for storing the horizontal portion 301a ahead of the bent portion so as to continue from the guide groove 2e. preferable. The horizontal portion 301a of the valve 301 can be stored in the recessed portion 2f, and the protruding amount of the valve 301 can be further reduced, which is convenient.

  Moreover, it is preferable that the inner diameter of the rim of the wheel 2 is substantially equal to the outer diameter of the driving device 5 such as a wheeled robot, a coaxial two-wheeled vehicle, or an electric wheelchair that is an attached body. Thereby, the space | gap inside the wheel 2 can be abbreviate | omitted and the whole to-be-attached body can be reduced more.

The wheel 1 having the above-described configuration can be assembled as follows.
First, the tube 3 is fitted into the tire 4, and the integrated tube 3 and the tire 4 are arranged on the outer periphery of the second wheel 202. At this time, the tube 3 is disposed on the outer periphery of the rim portion 2 c of the second wheel 202 in a form in which the valve 301 of the tube 3 is housed in the guide groove 2 e of the second wheel 202. In this way, the valve 301 is guided to the surface side of the wheel 2 outside the wheel 2 without protruding into the wheel 2.

  Next, the valve 301 is exposed from the notch 201b of the first wheel 201, and the bolt hole 201a of the first wheel 201 and the screw hole 202c of the second wheel 202 are arranged in a concentric position. In addition, the hollow portion 201 c of the first wheel 201 is fitted into the stepped portion 202 b of the second wheel 202. Then, the bolts 203 are screwed into the bolt holes 201a of the first wheel 201 and the screw holes 202c of the second wheel 202, which are in concentric positions, and are connected to each other.

  Finally, when the valve 301 is filled with air, the wheel 1 is completed. Thus, since the wheel 2 has a two-piece structure, the valve 301 can be easily assembled while being guided to the surface side of the wheel 2. Further, since the valve 301 is guided to the surface side of the wheel 2 outside the wheel 2, the tube 3 can be easily replaced simply by removing the first wheel 201.

  As shown in FIG. 4, the wheel 1 incorporates the wheel 2 into the drive device 5 so that the bolt hole 202 a of the wheel 2 is concentric with the bolt hole of the drive device 5. Bolts are screwed into the bolt holes 202a and the bolt holes of the driving device 5 to join each other. Incidentally, a female screw is cut in the inner peripheral portion of the bolt hole of the driving device 5 and meshes with a male screw of the screwed bolt.

  In the above-described embodiment, the guide groove 2e is formed in the connecting portion between the rim portion 2c and the disk portion 2d, that is, the thick portion so as to be inclined toward the surface side of the wheel 2, but this is not restrictive. The rim portion 2c may be formed with a thickness that allows the guide groove to be formed substantially horizontally, and the guide groove having a substantially horizontal shape may be formed in the rim portion 2c. In short, the guide groove only needs to be formed so that the valve 301 of the tube 3 can be guided to the surface side of the wheel 2 outside the wheel 2.

  Moreover, the hole which exposes the valve | bulb front-end | tip part of the said tube 3 is formed in the side wall of the tire 4, and the valve | bulb front-end | tip part may be guided to the said hole. In short, the wheel of the present invention may be guided to the surface side of the wheel outside the wheel without causing the tube valve to protrude into the wheel.

  Although the wheel of the said embodiment is set as the structure which can be used conveniently for a wheeled robot, a coaxial two-wheeled vehicle, an electric wheelchair, etc., it is not this limitation. You may use for a motor vehicle, a motorcycle, a trolley, etc.

  As mentioned above, although embodiment of the wheel which concerns on this invention was described, it is possible to change in the range which does not deviate not only from said structure but the technical idea of this invention.

It is the front view which showed roughly the wheel of the embodiment concerning the present invention. It is the longitudinal section showing the wheel of the embodiment concerning the present invention roughly. It is the perspective view which showed the 2nd wheel schematically. It is the longitudinal cross-sectional view which showed schematically the state which attached the wheel of embodiment which concerns on this invention to the drive device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wheel 2 Wheel 2a Front side flange part 2b Back side flange part 2c Rim part 2d Disk part 2e Guide groove 2f Recessed part 3 Tube 301 Valve 4 Tire 5 Drive device

Claims (9)

A wheel with a tube-type tire attached to the wheel,
The valve of the tube is a wheel guided to the surface side of the wheel outside the wheel. On the outer surface portion of the wheel, a guide groove for guiding the valve of the tube toward the front surface side of the wheel is formed,
The wheel according to claim 1, wherein the valve of the tube is guided to the surface side of the wheel by the guide groove.   The wheel according to claim 2, wherein the guide groove is formed so as to be inclined toward a surface side of the wheel and toward a central axis of the wheel.   The wheel according to claim 2, wherein the guide groove is formed substantially horizontally in a rim portion of the wheel. The disc portion of the wheel is formed with a recess for storing the valve so as to be continuous from the guide groove,
The wheel according to any one of claims 2 to 4, wherein a portion of the valve of the tube bent in the middle is stored in the recessed portion from the bent portion. The wheel includes a first wheel that forms a front flange portion, and a second wheel in which a rear flange portion, a rim portion, and a disk portion are integrally formed,
The wheel according to any one of claims 1 to 5, wherein the guide groove is formed in an outer surface portion of the rim portion and the disc portion of the second wheel.   The wheel according to claim 6, wherein a connecting portion between the rim portion and the disk portion is a thick portion, and the guide groove is formed in the thick portion.   The wheel according to any one of claims 1 to 7, wherein a rim inner diameter of the wheel is substantially equal to an outer diameter of a driving device such as a wheeled robot, a coaxial two-wheeled vehicle, or an electric wheelchair.   The wheel according to claim 1, wherein a hole for exposing a valve tip portion of the tube is formed in a side wall of the tire, and the valve tip portion is guided in the hole.

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