This application claims priorities of Taiwanese Utility Model Patent Application No. 104218825, filed on Nov. 24, 2015, and Taiwanese Utility Model Patent Application No. 105202359, filed on Feb. 19, 2016.
The disclosure relates to a wheel hub and a wheel including the same.
The wheels for a bicycle are the only components in direct contact with the ground. In concerning the safety of a rider, it is crucial to keep both wheels in perfect circle by the combination of wheel frames, spokes and wheel hubs. A bicycle wheel typically includes a wheel frame, wheel hub, and a plurality of spokes that are made of steel and that are connected between the wheel frame and the wheel hub, thereby generating a pulling force evenly distributed on the wheel frame and inwardly toward the wheel hub to maintain the shape of the wheel frame when under stress, such as a weight of the rider.
Referring to
Therefore, an object of the present disclosure is to provide a wheel hub that can alleviate at least one of the drawbacks associated with the prior art.
According to the present disclosure, the wheel hub is adapted to be mounted with a plurality of spokes. The wheel hub includes a hub body and two hub shells.
The hub body extends about a central axis. The hub shells are respectively connected to opposite ends of the hub body. Each of the hub shells includes a base wall, a surrounding wall and a mounting hole unit, wherein: the base wall has a first base portion extending radially and outwardly from the hub body, and a second base portion extending from the first base portion in an axial direction relative to the central axis; the surrounding wall extends radially and outwardly from the second base portion of the base wall; and the mounting hole unit includes a plurality of first mounting holes formed in the base wall and spaced apart from each other, and a plurality of second mounting holes formed in the surrounding wall and spaced apart from each other. Each of the first and second mounting holes is adapted to permit a corresponding one of the spokes to be mounted to the base wall therethrough.
Another object of the disclosure is to provide a wheel that can alleviate at least one of the drawbacks associated with the prior art.
According to the present disclosure, the wheel includes a wheel hub, a wheel frame, a plurality of first spokes and a plurality of second spokes.
The wheel hub includes a hub body that extends about a central axis, and two hub shells that are respectively connected to opposite ends of the hub body.
Each of the hub shells includes a base wall, a surrounding wall and a mounting hole unit, wherein: the base wall has a first base portion extending radially and outwardly from the hub body, and a second base portion extending from the first base portion in an axial direction relative to the central axis; the surrounding wall extends radially and outwardly from the second base portion of the base wall; and the mounting hole unit includes a plurality of first mounting holes formed in the base wall and spaced apart from each other, and a plurality of second mounting holes formed in the surrounding wall and spaced apart from each other.
The wheel frame surrounds the wheel hub, is rotatable about the central axis, and is formed with a plurality of securing holes spaced apart from each other.
Each of the first spokes has opposite ends that are respectively secured to a corresponding one of the first mounting holes of the mounting hole unit of a corresponding one of the hub shells, and a corresponding one of the securing holes.
Each of the second spokes has opposite ends that are respectively secured into a corresponding one of the second mounting holes of the mounting hole unit of a corresponding one of the hub shells, and a corresponding one of the securing holes.
Other features and advantages of the present disclosure will become apparent in the following detailed description of the embodiments with reference to the accompanying drawing, of which:
Before the disclosure is described in greater detail, it should be noted that where considered appropriate, reference numerals or terminal portions of reference numerals have been repeated among the figures to indicate corresponding or analogous elements, which may optionally have similar characteristics.
Referring to
The wheel hub 4 includes a hub body 41 that is cylindrical in shape and that extends about a central axis (L1), and two hub shells 42 that are respectively connected to opposite ends of the hub body 41. Each of the hub shells 42 includes a base wall 421 that has a first base portion 424 extending radially and outwardly from the hub body 41 and a second base portion 425 extending from the first base portion 424 in an axial direction (A) relative to the central axis (L1), a surrounding wall 422 that extends radially and outwardly from the second base portion 425 of the base wall 421, a mounting hole unit 43 that includes a plurality of first mounting holes 431 formed in the base wall 421 and spaced apart from each other, and a plurality of second mounting holes 432 formed in the surrounding wall 422 and spaced apart from each other, and a surrounding space 423 that is defined by the hub body 41, the first base portion 424 and the second base portion 425 and that is in spatial communication with the first mounting holes 431. The second base portion 425 of each of the hub shells 42 extends away from the other one of the hub shells 42. Each of the first mounting holes 431 of the mounting hole unit 43 of each of the hub shells 42 extends from the first base portion 424 of the base wall 421 of the hub shell 42 into the second base portion 425. Each of the second mounting holes 432 of the mounting hole unit 43 of each of the hub shells 42 extends through the surrounding wall 422 of the hub shell 42 in the axial direction (A).
The wheel frame 5 surrounds the wheel hub 4, is rotatable about the central axis (L1), and is formed with a plurality of securing holes 51 that are spaced apart from each other.
Each of the first and second mounting holes 431, 432 of the mounting hole unit 43 of each of the hub shells 42 is adapted to permit a corresponding one of the first and second spokes 6, 7 to be mounted to the base wall 421 of the hub shell 42 therethrough. Specifically, each of the first spokes 6 has opposite ends that are respectively secured into a corresponding one of the first mounting holes 431 of the mounting hole unit 43 of a corresponding one of the hub shells 42, and a corresponding one of the securing holes 51. Each of the second spokes 7 has opposite ends that are respectively secured into a corresponding one of the second mounting holes 432 of the mounting hole unit 43 of a corresponding one of the hub shells 42, and a corresponding one of the securing holes 51.
Referring to
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When viewing in a horizontal direction (H) (see
a vertical rotating line (L2) is defined to contact the wheel frame 5 at upper and lower ends thereof, i.e., an upper frame-connecting point 81 and a lower frame-connecting point 82 disposed under the upper frame-connecting point 81;
two straight first extending lines (L3) are defined to each extend from an upper end 441 of a respective one of the first imaginary circles 44 to the upper intersecting point 81;
two straight second extending lines (L4) are defined to each extend from a lower end 442 of a respective one of the first imaginary circles 44 to the lower intersecting point 82;
two straight third extending lines (L5) are defined to extend from an upper end 451 of a respective one of the second imaginary circles 45 to the upper intersecting point 81;
two straight fourth extending lines (L6) are defined to each extend from a lower end 452 of a respective one of the second imaginary circles 45 to the lower intersecting point 82;
a first stress region (A1) is defined among the first extending lines (L3), first imaginary circles 44 and the second extending lines L4; and
a second stress region (A2) is defined among the third extending lines (L5), the second imaginary circles 45 and the fourth extending lines (L6).
Each of the first extending lines (L3) cooperates with the rotating line (L2) to define a first angle (θ1) therebetween. Each of the third extending lines (L5) cooperates with the rotating line (L2) to define a second angle (θ2) therebetween that is larger than the first angle (θ1). Each of the second extending lines (L4) cooperates with the rotating line (L2) to define a third angle (θ3) therebetween. Each of the fourth extending lines (L6) cooperates with the rotating line (L2) to define a fourth angle (θ4) therebetween that is larger than the third included angle (θ3).
It is noted that the first stress region (A1) is a stress region defined by the first spokes 6 when rotating about the central axis (L1), and the second stress region (A2) is a stress region defined by the second spokes 7 when rotating about the central axis (L1). When one of one type of spokes 6, 7 is broken, the other type of the spokes 6, 7 is still capable of evenly distributing the stress on the wheel frame 5. For example, when one of the first spokes 6 is broken, the second spokes 7 can evenly distribute the stress on the wheel frame 5. The first stress region (A1) has an area different from that of the second stress region (A2). In this embodiment, the area of the first stress region (A1) is smaller than the area of the second stress region (A2).
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To Sum up, with the configuration of the base wall 421, and the first and second mounting holes 431, 432, the wheel of this disclosure is capable of accommodating two kinds of spokes 6, 7, such as straight pull and J-bend spokes. Moreover, with the first and second spokes 6, 7 defining the first and second stress areas (A1, A2), when one type of spokes 6, 7 is broken, the other type of the spokes 6, 7 is still capable of evenly distributing the stress on the wheel frame 5.
In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects.
While the disclosure has been described in connection with what are considered the exemplary embodiments, it is understood that this disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
Number | Date | Country | Kind |
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104218825 | Nov 2015 | TW | national |
105202359 | Feb 2016 | TW | national |