JP3052650U - Hub for wheels - Google Patents

Abstract

(57) [Summary] [Problem] A hub for a wheel that is strong, hardly deforms or breaks a shaft tube and a disk, does not have to worry about reducing the resistance of the wheel to a force received from a side surface, and is easy to lock a spoke. To provide. SOLUTION: The wheel hub 1 is composed of a shaft tube 11 and a disk 12 protruding on an outer periphery of a central portion in an axial direction thereof, and a plurality of recesses 122 are formed on an outer peripheral surface of the disk 12, and these recesses 122 are formed. The spokes are alternately opened to the opposite side, and the spoke locking holes 121 are respectively formed in the side faces opposite to the side opening of the recess 122. The thickness of the disk 12 can be made smaller than the axial width of the rim.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a wheel hub suitable for a bicycle or the like.

[0002]

[Prior art]

 Conventionally, as shown in FIGS. 6 to 8, disc-shaped flanges 42, 43 are respectively protruded on the outer periphery near both ends of the shaft pipe 41, and spoke engaging holes are formed in the flanges 42, 43 along the circumferential direction. Wheel hubs 4 drilled at appropriate intervals are known. The wheel is constructed by radially extending a plurality of spokes 2 between the spoke locking holes of the flanges 42 and 43 and the rim 3.

In the wheel hub 4, a bending moment M applied to the shaft pipe 41 by a force transmitted from the rim 3 through the spokes 2 is expressed by the following equation. M = F * LF; force applied to flanges 42 and 43 L; distance from center G of shaft tube 41 to flanges 42 and 43 The above-described conventional wheel hub 4 is arranged such that flanges 42 and 43 are formed from center G of shaft tube 41. Since the distance L to the shaft tube 41 is long, the bending moment M applied to the shaft tube 41 becomes very large, and the shaft tube 41 may be deformed. In addition, since the flanges 42 and 43 protrude laterally more than the rim 3, there is a drawback that the wind is easily affected by the wind and the speed is hardly increased.

Therefore, as shown in FIGS. 9 and 10, a disk-shaped flange 51 is protruded around the axial center of the shaft tube, and a spoke locking hole is formed in the flange 51. Hub 5 has been proposed. In the wheel hub 5, since a force is applied to the axial center of the shaft tube, the bending moment M hardly occurs, and the wind resistance can be reduced.

However, as shown in FIG. 10, the spoke 2 provided between the wheel hub 5 and the rim 3 has a very small inclination angle, so that the spoke 2 is not vulnerable to the force received from the side surface of the wheel. As a result, when traveling on a bad road such as a mountain road, an accident is likely to occur in which the wheels turn or lose balance and fall over. Therefore, such a wheel hub 5 is hardly adopted except for a racing bicycle which runs only on a flat course. Further, since the conventional wheel hubs 4 and 5 use the flat flanges 42, 43 and 51, there is a disadvantage that the flanges 42, 43 and 51 have low strength and are easily broken.

[0006]

[Problems to be solved by the invention]

 An object of the present invention is to provide a wheel hub that is strong and hard to deform or break the shaft tube and the disk, does not reduce the resistance of the wheel to the force received from the side, and easily locks the spokes. Is to do.

[0007]

[Means for Solving the Problems]

 The wheel hub of the present invention has a disk protruding on the outer periphery of the axial center of the shaft tube, and a plurality of recesses arranged along the circumferential direction on the outer peripheral surface of the disk, and these recesses are alternately arranged on opposite sides. And a spoke locking hole is formed in a side surface facing the side opening. The side walls of the recess and the partition wall between the recesses serve as reinforcing ribs to increase the strength of the disk, and by opening the recess to the side, a sufficient space is formed inside the spoke locking hole, and the spoke Locking to the stop hole becomes easy. A configuration in which recesses are formed in a single disk and spokes are alternately locked on the opposite side of each recess, so that no bending moment is generated in the shaft tube despite the relatively large inclination angle of the spokes .

It is preferable that the thickness of the disk is smaller than the width of the rim in the axial direction. With this configuration, since the disk does not protrude laterally beyond the rim, the thickness of the wheel is reduced and the wind resistance is reduced.

[0009]

[Embodiment of the invention]

 As shown in FIG. 1, the wheel hub 1 according to the present invention includes a shaft tube 11 and a disk 12 which is integrally formed on the outer periphery of a central portion in the axial direction. The shaft tube 11 is a circular tube having an appropriate length, is fitted and fixed to the outer periphery of a rotating shaft (not shown), and can rotate together with the rotating shaft.

As shown in FIG. 2, the disk 12 is formed to be slightly thinner than the axial width of the rim 3 of the wheel. As shown in FIG. 1, a plurality of recesses 122 are formed on the outer peripheral surface along the circumferential direction. It will be arranged. The recesses 122 are respectively opened in the outer circumferential direction and alternately on the opposite side, and the spoke locking holes 121 are respectively formed in the side faces facing the side opening. That is, the spoke locking holes 121 are arranged at appropriate intervals along the circumferential direction and alternately on the opposite side of the disk 12 in the thickness direction.

To assemble the wheel, as shown in FIG. 2, the spoke 2 is inserted through the spoke locking hole 121 from the inside to the outside by passing through the opening of the recess 122 to the side. A large-diameter stopper 21 formed at one end of the second stopper 2 is engaged with the side surface of the recess 122. Then, the other end of the spoke 2 is locked to the rim 3. Then, the disk 12 and the spokes 2 do not protrude to the side than the rim 3 and the wind resistance is small. Moreover, the spokes 2 are alternately inclined in opposite directions and at an appropriate angle with respect to the center of the wheel in the axial direction, so that the spokes 2 can resist a force received from any side surface of the wheel.

Further, since the force transmitted from the spokes 2 to the wheel hub 1 is concentrated on the disk 12 provided at the center of the shaft tube 11, almost no bending moment is applied to the shaft tube 11. The wheel hub 1 of the present invention can be used for a bicycle wheel, a wheelchair wheel, and the like.

[0013]

[Effect of the invention]

 According to the structure described in claim 1, since the disk is reinforced by the side surfaces of the concave portion and the partition wall between the concave portions and has high strength, there is no fear of deformation or breakage, and almost no shaft tube is provided. Since no bending moment is applied, deformation of the shaft tube is prevented, and as a result, durability is improved. In addition, since the spokes attached to the wheel hub are inclined at an appropriate angle, the wheels become strong against the force from the side, and the wheels may be deformed or fall over even on rough roads. Absent. Further, since the concave portion is opened to the side, the spoke can be easily inserted into the spoke locking hole, and the workability is good. According to the configuration described in claim 2, since the disk does not protrude to the side from the rim, the wind resistance can be reduced, and therefore, high-speed traveling is possible.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wheel hub showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a wheel equipped with the wheel hub of the present invention.

FIG. 3 is a perspective view of a conventional wheel hub.

FIG. 4 is a side view of the above.

FIG. 5 is a longitudinal sectional view of a wheel equipped with a conventional wheel hub.

FIG. 6 is a perspective view of another conventional wheel hub.

FIG. 7 is a longitudinal sectional view of a wheel equipped with another conventional wheel hub.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wheel hub 11 Shaft tube 12 Disk 121 Spoke locking hole 122 Concave part 2 Spoke 21 Stopper 3 Rim

Claims (2)

[Utility model registration claims] 1. A wheel hub comprising a disc extending over an outer periphery of an axial center portion of a shaft tube and a plurality of spoke locking holes formed in the disc, wherein a plurality of recesses are formed on an outer peripheral surface of the disc. Are arranged along the circumferential direction, these recesses are alternately opened to the opposite side, and the spoke locking holes are respectively formed in the side faces opposite to the side openings of the recesses. Hub for wheels. 2. The wheel hub according to claim 1, wherein the thickness of the disk is smaller than the width of the rim in the axial direction.