TWI579156B - Improvements in bicycle wheels - Google Patents

Description

Bicycle wheel construction

The present invention relates to improvements in bicycle wheels, and more particularly to a bicycle wheel having a modified rim configuration.

Conventional bicycle rims are made from directly extruded materials. For example, the metal material is cut, bent into an arc shape, and the tail ends are bonded, welded or otherwise joined together. The wheel rings can also be made of synthetic materials such as carbon fiber reinforced plastic. Such a rim can be directly formed into an arc without a bending step. In the above two manufacturing methods, the depths of the rims are the same everywhere. The spokes are connected to a plurality of contacts that surround the radially inner side of the wheel rim. Alternatively, the rim and spoke may be integrally formed from a composite material.

In use, conventional bicycle rims are susceptible to aerodynamic forces. For example, the design of a conventional bicycle rim creates a greater resistance to the wheel, thereby reducing the speed of the bicycle. In addition, the ambient airflow relative to the yaw angle of the direction of travel of the bicycle may cause a lateral resultant force to the wheels. If the resultant force acts on the front or the rear of the hub, a moment will be generated that surrounds the center of the wheel. As far as the front wheels are concerned, they will be driven away from the original direction of travel. The rider needs to apply more force to offset the resultant force. The point of action on the wheel is the center of pressure. In particular, the center of pressure is defined as a point of action that is zero when the moments of the horizontal and vertical axes of the wheel plane are zero (ie, zero yaw and zero rotation). This point of action does not apply to the zero yaw angle because its lateral force is an effective zero value.

A new bicycle gear train has been developed to overcome or ameliorate the aforementioned conventional and other related deficiencies.

In use, it has been found that rims having a leading edge and/or trailing edge, and/or one or more spokes having a wavy configuration are more susceptible to aerodynamic forces.

Thus, in accordance with a first aspect of the present invention, a wheel for a bicycle includes: a hub that can be mounted to the bicycle, a rim that can assemble a tire, and a wheel and the wheel that extend A plurality of spokes between the turns, wherein the rim or one or more spokes have a leading or trailing edge, at least the portion of the leading and/or trailing edge having a wavy configuration.

In some embodiments, at least a portion of the rim has a wavy configuration on a radially inner side.

Computational fluid dynamics analysis, with a resistance of 15 meters per second, compares wheels for undulating rims, and conventional wheels that lack wavy rims. The rate of 15 meters per second is chosen because the rate is close to the racing speed of the advanced bicycle. The results show that for a wheel with a wavy configuration rim, the resistance is reduced in the yaw angle range.

The wavy configuration can be in a smooth and smooth form, that is, between the crests and troughs, the undulating configuration has substantially no angular transition, or a completely angular transition. The wavy configuration can be placed around the edge, intermittently undulating, or preferably continuously undulating. The wavy configuration of the crests and troughs is a regular or irregular interval.

The radially inner side has a wavy configuration with a radial distance that varies between peaks and troughs of the undulating configuration, which may be continuous undulations. In this configuration, the radially inner side may include a plurality of recesses and projections that are continuously and alternately joined. In a preferred embodiment, the peak of each undulating configuration on the wheel plane has a convex configuration. There are at least three pairs of crests and trough extensions arranged radially inward, or there may be twelve pairs, or preferably at least twenty-four pairs.

The radially inner side may have a regular wave configuration, having the same height, or alternately arranged in two or more different heights. The height is defined as the radial height relative to an annular base of the rim. The difference in radial height between the crests and troughs of the undulating configuration is preferably at least five millimeters, preferably at least ten millimeters, or most preferably at least twenty millimeters.

The one or more spokes may also have a wavy configuration disposed on at least the leading edge and/or the trailing edge. The undulating configuration preferably has the features described above in relation to the radially inner side of the rim.

In other embodiments, one or more of the spokes may have a leading edge and/or a trailing edge, at least a portion of the leading or trailing edge having a wavy configuration. This may be another, or alternatively, a wavy configuration on the radially inner side of the rim.

The wavy configuration of these embodiments may be in a smooth and smooth form, that is, between peaks and troughs, the wavy configuration has substantially no angular transition, or no angular transition at all. The wavy configuration can be placed around the entire edge, intermittently undulating, or optimally undulating. The peaks and troughs of the wavy configuration may be arranged at regular or irregular intervals.

The one or more spokes may have a regular wave configuration that has the same height, or alternately arranged in two or more different height modes. The height is defined as the radial height relative to an annular base of the rim. The difference in radial height between the crests and troughs of the wave configuration is preferably at least five millimeters, preferably at least ten millimeters, or most preferably at least twenty millimeters.

More preferably, the one or more spokes have a leading edge and a trailing edge, and at least portions of the leading and trailing edges have a wavy configuration. In most preferred embodiments, the one or more spokes have an oval or elliptical cross section.

The rim has a plurality of side surfaces that are in contact with the radially inner side of the rim. The side surfaces are preferably of a smooth construction and are mostly convex. In particular, the plurality of side surfaces are bent from the base of the rim from side to side and then bent laterally inwardly before contacting the radially inner edge of the rim. The side edge of the rim is greater than the side edge of the tire mounted to the rim, which corresponds to at least a portion or preferably a majority of the rim depth of the wheel plane.

The radially inner side of the rim having a wavy configuration is preferably spaced inwardly from the side edges of the rim and is substantially centrally aligned between the side edges of the rim, i.e., flush with the center plane of the wheel . In some embodiments, particularly in the radial direction of the rear wheel rim The side will counteract the unequal tension created by the undulations of the spokes. The radially inner side is preferably annular to form a smooth convex curve at a right angle to the wheel plane. The side surfaces of the rim have an annular interior defined as the radially inner edge. The outer cross-sectional profile of the plurality of side surfaces is located radially inward of the rim and has a radius of at least five millimeters, or preferably at least ten millimeters.

Computational Fluid Dynamics Analysis, the wheel according to the present invention has an annular radially inner and undulating configuration, and a wheel having an annular radially inner side without a wavy configuration for comparison at pressure center positions of different yaw angles. The results show that when the yaw angle is zero, five, ten, fifteen and twenty degrees respectively, the wheel with wavy configuration rim is compared to the conventional wheel lacking the wavy configuration rim. The pressure center is closer to the hub. Therefore, with respect to the wheel having the conventional rim, the wheel having the wavy configuration rim does not withstand excessive force, and the front wheel produces yaw. This also means that the rider does not need to double the force to offset the resultant force.

The undulating configuration may be in a smooth form, and the radially inner side may include a plurality of recesses and projections that are consecutively and alternately joined. However, the aerodynamic advantage also exists in a rim having an annular base and a plurality of protrusions, and corresponding to the plane of the wheel, at least one end of the protrusions has a tapered width, and a tip for a spoke Connected. In particular, in the above configuration, corresponding to the plane of the wheel, the radially inner side of the rim may include a recess that is continuously joined and separated by a tip.

Further, when a part of the protrusion serves as a support portion of the wheel spoke, the plurality of protrusions have an aerodynamic advantage. In particular, the support portion for connecting the spokes reduces the pressure at which the rim is connected to the spokes. Therefore, some of the plurality of protrusions are preferably defined as the support portions of the wheel spokes.

In accordance with another aspect of the present invention, a wheel for a bicycle includes: a hub that mounts the wheel to the bicycle, a rim, and a plurality of spokes extending between the hub and the rim, wherein The rim has an annular base and a A support portion that engages each spoke and protrudes from the base, and a width of a tail end of each support portion, corresponding to a plane of the wheel, is tapered to form a tip end and the spoke is connected.

The support portion of each spoke is mostly projecting radially inwardly from the base portion, or the spokes are connected to the hub in a crosswise configuration.

An advantage of the wheel of the present invention is that the support reduces the pressure at the junction of the rim and the spoke. This means that a wheel having the same strength as a conventional wheel can be manufactured with less or lighter materials, thereby reducing the weight and manufacturing cost of the wheel. Alternatively, a wheel having the same weight as a conventional wheel can be manufactured, but with better strength.

The configuration of the support portion of each spoke is designed to reduce the concentration of pressure on the rim and to mount on a fixed radial surface relative to a spoke. Each support portion has a height which is a distance from the support portion protruding from the base portion, at least ten percent, preferably at least twenty percent, or most preferably at least 20 percent of the width of the bottom surface of the support portion Twenty-five percent. Preferably, each support portion protrudes at least five millimeters, preferably at least ten millimeters, or most preferably at least twenty millimeters, relative to the base. At least in the tip end portion of the support portion, the width thereof is reduced in a fixed ratio corresponding to the wheel plane, so that the outer contour of the support portion is formed into a generally triangular or trapezoidal shape. Alternatively, the width of the support portion is reduced by an increasing ratio corresponding to the plane of the wheel. In particular, the support portion can have a convex shape (i.e., a dome shape) on each side of the top end. However, in the preferred embodiment, the width of the support portion is reduced by a decreasing ratio. In particular, the support portion has a concave shape that terminates on each side of the tip end.

Each support portion may also have a tapered width that is aligned with the long axis of the spoke so that the support portion has a conical configuration. The support portion has a cross section which is located in a plane perpendicular to the long axis of the spoke, which is an elliptical shape, with respect to the other planes which are axially flush with the spokes.

At least corresponding to the plane of the wheel, the shape of the support is smooth. And at least in the plane of the wheel, the support portion has a width that continuously tapers between the base and the tip that engages the spoke. In detail, the radial inner surface of the support portion The face, between the base and the tip that engages the spoke, is more than ninety degrees relative to the long axis of the spoke.

Each of the support portions may have a width on the bottom surface thereof, which is substantially the same as the interval between the spokes, so that the support portions are connected to the rim. Or each support portion may have a width on the bottom surface thereof, which is smaller than the interval between the spokes, that is, the base portion of the rim or other structure is disposed between the support portions of the adjacent spokes, and is located at the rim On the radially inner side.

The rim can include a number of auxiliary configurations disposed between the supports and having an aerodynamic advantage. The auxiliary configurations may have protrusions of the same configuration as the support portion. Preferably, in the plane of the wheel, the auxiliary configurations are convex or preferably dome-shaped having an elliptical cross-section that is perpendicular to the long axis of the spoke.

The tip of each support portion preferably has an end face that can be connected to the spoke or integrally formed. In one of the above configurations, the spokes are separate objects separate from the rim, and the tip of the support portion is adapted to engage the end of the spoke. Alternatively, the spoke and the rim are integrally formed as part of the rim.

In a preferred embodiment of the present invention, the support portion and the adjacent spoke surface are of a smooth type, that is, the support portion and the spoke do not have a shoulder portion, and the configuration of the rim and the spoke is preferably made of a synthetic material. , molded in one piece. However, in some embodiments, it is possible to have a small shoulder. The shoulder protrudes from the spokes by less than fifteen millimeters, preferably about or less than ten millimeters, or about or less than eight millimeters. In these embodiments, the support portion is defined at an end surface between the spoke and the tip, the area of which is less than fifty percent of the base portion of the support portion, that is, the annular base of the rim Interface. Preferably, the end face area is less than thirty percent of the base of the support portion, and most preferably less than twenty percent.

When the spokes are separate objects, they are attached to the rim and assembled to the corresponding support by a suitable fixture. The fixture allows the spoke to be assembled under a force. A conventional holder extends from a hole in one of the rim walls and has An enlarged head is disposed on a radially outer surface of the rim wall, and a threaded connector is disposed radially inward of the rim wall for connecting the spoke. A holder of the foregoing type is used for the tip end of the support portion to include the aforementioned hole for mounting the holder. In these configurations, the surface adjacent the support portion and the spoke is preferably of a flat configuration, that is, the support portion and the spoke do not have a shoulder.

Another method of securing the spokes to the rim includes a plurality of spokes extending from one of the rim walls and utilizing the spoke having an enlarged head retained on a radial side of the rim wall surface. Yet another method is that the plurality of spokes can be adhesively secured to the rim.

Each support portion preferably has a single spoke that is aligned or substantially aligned with the central axis of the support portion. In particular, the spoke can extend from the center of the end face of the support portion. Alternatively, each support portion is coupled to support two spokes, and the spokes are preferably coupled to opposite faces of the hub. The support portions are symmetrical to each other at least in the plane of the wheel, and are preferably symmetrical with respect to the long axis of the spoke. Alternatively, the support portion may be asymmetrical with respect to the plane of the wheel, and is particularly biased to one side. The foregoing configuration helps to have unequal tension on the spokes on one side of the wheel, or other advantages.

The annular base of the rim preferably has a fixed radial height, i.e., the rim has a certain radial height from which the support and any other structure protrude. The radial height of the annular base may be greater than the radial height of the support relative to the base.

The hub can be in a conventional form for rotatably mounting to a bicycle frame. Generally, the hub defines a convex portion for pivotally engaging a bicycle frame with respect to the two sides of the wheel. For example, the hub can include a cylindrical projection that projects from opposite sides of the wheel to rotatably assemble to an opening in the frame of the vehicle. The spokes may be coupled to the hub by a suitable securing means or integrally formed with the hub. Typically, the hub defines a plurality of engagement points for connecting the spokes, and the engagement point can be an opening in which a fixture for securing the spoke can be mounted. In certain embodiments, the hub includes a center member having a cylindrical configuration. The center member can have a convex edge to connect the spoke.

The rim can define a radially outer surface to secure a tire. The radially outer surface is generally defined as a U- or V-shaped peripheral channel for tire mounting. The peripheral channel can be defined as an annular support flange that projects from each side of the radially outer surface. The rim can be made of metal or cast from a synthetic material.

The spoke is in an elongated form and provides a suitable connection between the hub and the rim for mounting the wheel to the bicycle. The spoke can be made of metal, plastic or synthetic material in a long rod, sheet or aerodynamic configuration.

The wheel typically has three or more spokes, such as twelve, sixteen or even more. When the wheel has twelve or more spokes, the spokes are preferably individual pieces, one end of which is coupled to the hub of the wheel and the other end of which is coupled to a support portion. Typically, the spokes are formed or molded from metal, synthetic or other suitable material, and then joined to the rim and hub by bonding, welding, riveting or other joining or a combination of the foregoing. To form a one-piece structure. However, bicycles used in time trials should have fewer than twelve wheel spokes, such as three, four, five or six spokes. In the above configuration, the spokes are preferably integrally formed with the hub and rim of the wheel, such as cast from a synthetic material.

To reduce weight, the rim is generally hollow with its radially inner and outer walls joined to its side walls and forming a trough therein. In certain embodiments, the rim can comprise a reinforced core material such as a foamed polymer, wood such as balsa, or other reinforced core material. The wheel includes a tire mountable to a radially outer surface of the rim that is inflatable and can be unloaded to the rim during unloading. The wheel of the present invention is suitable for use in a variety of different types of bicycles, including racing bicycles and recreational bicycles.

According to other aspects of the invention, a bicycle has at least one of the aforementioned wheels.

The drawings are provided as a detailed description of the embodiments of the present invention.

Referring to the first figure, the bicycle wheel 1 of the present invention comprises: an annular rim 2, a plurality of elongated spokes 3 and a central hub 4.

The annular rim 2 defines a radially inner side 5 and a radially outer side surface, namely outer surfaces 7, 8. The radially inner side 5 is defined as the inner circumference of the rim 2, which faces the central hub 4 in the radial inner side. The outer side surface is defined as the outer circumference of the rim 2 and is spaced apart from the center hub 4 and faces outward.

Referring to the fourth figure, the side surfaces 7, 8 of the rim 2 are symmetrical with respect to the plane in which the wheel 1 is placed. In particular, each of the side surfaces 7, 8 is curved at a right angle to the plane of the wheel 1, and is generally of a convex configuration. The side surfaces 7, 8 are in contact with the radially inner side 5 of the rim. The side surfaces 7, 8 are bent from the base of the rim from side to side and then bent laterally inwardly before coming into contact with the radially inner edge of the rim. The side surface is in a smooth configuration.

A substantially V-shaped annular channel is provided on the outer periphery of the rim 2 for mounting of the tire 6.

The hub 4 comprises a long strip of cylinders 13. The two flanges 14 are disposed close to the two ends of the cylinder 13. Each spoke 3 engages a plurality of contacts on the outer surface of the flange 14. The joints are arranged around the flange 14 and are regularly spaced from one another. The setting position of the joint point defines the engagement pattern of the joint with the corresponding spoke 3. The spoke 3 is an elongated metal rod. Referring to the first to third embodiments, a total of twelve spokes are engaged in an alternating manner, with six spokes engaging one of the flanges 14 and the other six spokes engaging the other flange 14.

As described above, the two flanges 14 are disposed near the bottom end of the cylinder 13, but are not attached to the bottom end. That is, the end portion 15 of the cylinder 13 is convexly protruded from the wheel 1 and rotatably pivoted to the wheel 1 of a bicycle.

The radially inner side 5 of the rim 2 defines a plurality of peak-like configurations, including a plurality of supporting peak-shaped configurations (ie, support portions) 9 at each of the radially inner side 5 spokes, and each support portion 9 Connect a spoke 3. The peak configurations also include A dry auxiliary peak configuration (and auxiliary portion) 10 is located between the support portions. The support portion 9 and the auxiliary portion have a dome-shaped configuration and together form a regular wave inner surface of the rim 2. As shown in the first figure, it can be seen from the side of the wheel 1 that the support portion 9 protrudes slightly from the auxiliary portion 10.

The fifth to seventh figures are the wheel 201 of the second embodiment of the present invention. Referring to the fifth figure, a bicycle wheel 201 includes a rim 202 and a hub 204. The rim 202 includes a radially inner side 205, an outer surface 206, and side surfaces 207, 208. As with the first embodiment, the radially inner side 205 is defined as the inner circumference of the rim 202, i.e., the radially inner side 205 is facing the center hub 204. The outer surface 206 is defined as the outer circumference of the rim 202 and is spaced apart from the central hub 204 and faces outward.

As with the first embodiment, the side surfaces 207, 208 are symmetrical with respect to each other with respect to the plane in which the wheel 201 is placed. The side surfaces 207, 208 are curved at a right angle to the plane of the wheel 201 and are in contact with the annular radially inner side 205 of the rim 202.

The fifth through seventh embodiments disclose an embodiment having four wide spokes 216 that engage the radially inner side 205 of the rim 202 and the hub 204. The spokes 216 extend equidistantly spaced from the radially inner side 205 and engage the radially inner side 205.

Between the radially inner side 205 and the junction of the spokes 216, a plurality of equally spaced grooves 210 are defined, respectively. As shown in the fifth figure, the wheel is viewed from the side, the plurality of grooves 210 being in a wave configuration, which is a continuous peak-like configuration 211 and a groove 210. As shown in the fifth figure, the peak-shaped configurations 211 alternate with each other at two radially different heights. As described in the previous first embodiment, the radially inner rim 202 having a regular wave configuration is more aerodynamic.

Continuing to refer to the hub 204 shown in Figures 5-7, which includes an oblate circular disc having a thickness at the central portion that is greater than the thickness of the periphery. The hub 204 has a curved side surface that abuts the annular rim of the periphery of the disc such that the disc has a pointed cylindrical cross section. The hub 204 further includes a central shaft 218 that projects outwardly from a side surface of the hub 204. The central shaft 218 The utility model is used for pivotally pivoting a circular hole of a bicycle.

The spokes 216 engage at a plurality of engagement points that are equally spaced and surround the disk of the hub 204.

The eighth figure is a wheel 301 of a third embodiment of the present invention. This embodiment differs from the embodiment shown in the previous fifth to seventh embodiments in that the spokes 316 also have a wave configuration 319. In particular, the wave configuration 319 is defined on the long edge of the spoke 316. This spoke 316 also has the advantage of aerodynamics.

Please refer to the ninth to eleventhth drawings for the wheel 101 of the fourth embodiment of the present invention.

The inner surface of the rim 102 defines a plurality of grooves 110 that are disposed around the rim at regular intervals. The arrangement of the plurality of grooves 110 means that the inner surface 105 has a plurality of supporting peak-like configurations 111 (or supports), and each of the support portions 111 includes a tip end. The contour of the support portion 111 of the present embodiment is steeper than the peak-shaped configuration 9, 10 shown in the third figure.

The support portion 111 is located on either side of the groove 110 and thus extends around the inner surface 105 of the rim 102 at equidistant intervals. As shown in the ninth figure, it can be seen from the side view of the wheel 101 that each of the grooves 110 is symmetrical with respect to an axis passing through the hub 104 and divides the two connected support portions 111.

The groove 110 of the rim 102 of the present embodiment is deeper than the first embodiment, and the support portion 111 is not in a smooth form but has a tip end instead. In addition, each support portion of the inner circumference of the rim is coupled to a spoke 103. In the present embodiment, the support portion 111 has an advantage of reducing the pressure at which the rim 102 and the spoke 103 are joined.

Each spoke 103 is coupled to a corresponding tip of the flange 114 and the support portion 111. The tip end of each support portion 111 provides a connection pattern for connecting the corresponding spokes 103. In the embodiment shown in the ninth to eleventh figures, each support portion 111 engages the opposite flange 114 to its adjacent support portion 111.

In use, the weight of the knight and the bicycle skeleton are transmitted to the bicycle separately Each hub 104 of the wheel 101. The wheel 101 is thus compressed, particularly at the junction of the spoke 103 and the inner surface 105 of the rim 102. The wheel 101 having the aforementioned configuration is subjected to less pressure at the same pressure with respect to the wheel lacking the aforementioned configuration.

The support portion 111 reduces the pressure at which the rim 102 and the spoke 103 are joined. In other words, this means that a wheel having the same strength as a conventional wheel can be manufactured with less or lighter materials, thereby reducing the weight and manufacturing cost of the wheel. Alternatively, a wheel having the same weight as a conventional wheel can be manufactured, but with better strength.

Figure 12 is a side view of two conventional wheels and two different wheels of the present invention. Wheels (a) and (d) are conventional, non-wavy rims. The wheel (c) has the configuration of the embodiment as shown in the first to fourth figures, and the wheel (b) has the configuration of the embodiment as shown in the ninth to eleventh figures. Continued See Figure 13 for an outline of the outer contour of a rim. Relative to the wheels (b) and (d), the wheels (a) and (c) as a whole have a thicker radial configuration and a more rounded radially inner edge. However, the four wheels have the same number of spokes and the same hub configuration, and all of the spokes of the four wheels have the same cross section. This ensures that any difference in the results of the computational fluid dynamics analysis is due to different rim configurations, rather than different spoke and hub configurations.

The four wheels are subjected to computational fluid dynamics analysis at a rate of 15 meters per second and yaw angles of zero, five, ten, fifteen and twenty degrees, with respect to lift, drag, lateral force, moment and The analytical data for the center pressure of each wheel at each yaw angle is illustrated in Figure 14.

The fifteenth figure is the analytical data of the computational fluid dynamics of the fourteenth figure, corresponding to the comparison of the resistances within the range of the measured yaw angle. The wheels (a) and (c) have the same profile with the only difference that the wheel (c) has a radially inner side of the wavy configuration. The analytical data shows that the wheel (c) with a wavy configuration produces less resistance than the conventional, non-wavy wheel (a) in all tested yaw angles. Similarly, wheels (b) and (d) have the same profile, the only difference being the car The wheel (b) has a radially inner side of the wavy configuration. The analysis data shows that the wheel (b) having a wave configuration produces less resistance than the conventional wheel having no wave configuration (d) at least when the yaw angle is from zero degrees to ten degrees. The analytical data also shows that the wheel (c) having both a wavy configuration and a relatively rounded radially inner side produces the least resistance.

Figure 16 is the analytical fluid dynamics analysis data of Figure 14 showing the relative pressure center position over the range of yaw angles tested. Basically, the closer the pressure center is to the hub, the less force is applied to the front wheels, ie the rider does not need to apply more force to counteract the resultant force. The analysis data shows that the center pressure of the rounded radially inner wheels (a) and (c) in the range of yaw angles tested is always maintained at a short distance from the front end of the hub. The wheels are in the range of yaw angles tested, and the center of the wheel (c) having a wavy configuration is closer to the hub than the conventional wheel (a) having no wavy configuration.

1‧‧‧ Wheels

2‧‧‧ rims

3‧‧‧ spokes

4‧‧‧Center hub

5‧‧‧radial inner side

6‧‧‧ tires

7,8‧‧‧ outer surface

9‧‧‧Support peak shape configuration

10‧‧‧Auxiliary peak configuration

13‧‧‧Cylinder

14‧‧‧Flange

15‧‧‧End

101‧‧‧ Wheels

102‧‧‧ rims

103‧‧‧ spokes

104‧‧·wheels

105‧‧‧ inner surface

110‧‧‧ Groove

111‧‧‧Support peak shape configuration

114‧‧‧Flange

201‧‧‧ wheels

202‧‧‧ rims

204‧‧·wheels

205‧‧‧radial inside

206‧‧‧ outer surface

207, 208‧‧‧ side surface

210‧‧‧ Groove

211‧‧‧ Peak configuration

216‧‧‧ spokes

218‧‧‧ center axis

301‧‧‧ Wheels

316‧‧ spokes

319‧‧‧ Wave configuration

The first figure is a side view of a first embodiment of the wheel of the present invention.

The second figure is a front view of the wheel of the first figure.

The third figure is a perspective view of the first figure and the second figure.

The fourth figure is a cross-sectional view of the wheel of the first to third figures.

Figure 5 is a side elevational view of a second embodiment of the wheel of the present invention.

The sixth picture is a front view of the wheel of the fifth figure.

The seventh figure is a perspective view of the wheels of the fifth and sixth figures.

The eighth figure is a side view of a third embodiment of the wheel of the present invention.

Figure 9 is a side view of a fourth embodiment of the wheel of the present invention.

The tenth figure is a front view of the wheel of the ninth figure.

Figure 11 is a perspective view of the wheels of the ninth and tenth figures.

Figure 12 (a) and (d) are side views of two conventional wheels.

Twelfth Figures (b) and (c) are side views of two different wheels of the present invention having the same spokes as in Figures 12(a) and (d).

Fig. 13 (a) to (d) are respectively sectional views of the outer contours of the wheel rims in the twelfth drawings (a) to (d), respectively.

Figure 14 is the analytical data of computational fluid dynamics of the wheels of the twelfth and thirteenth figures.

The fifteenth figure is a comparison diagram of the analytical fluid dynamics analysis data corresponding to the resistance within a yaw angle range of the fourteenth figure.

The sixteenth figure is a comparison diagram of the calculation data of the computational fluid dynamics of the fourteenth figure corresponding to the pressure center position within a range of yaw angles.

1‧‧‧ Wheels

2‧‧‧ rims

3‧‧‧ spokes

4‧‧‧Center hub

5‧‧‧radial inner side

6‧‧‧ tires

7‧‧‧ outer surface

Claims (22)

A wheel for a bicycle, comprising: a hub that mounts the wheel to the bicycle, a rim that can be assembled with a tire, and a plurality of spokes extending between the hub and the rim, wherein the rim Having a radially inner portion, at least the radially inner portion has a wavy configuration, and the rim has a radial distance that varies between peaks and troughs of the undulating configuration, the wheel plane The peak of each wavy configuration has a convex configuration. The wheel of claim 1, wherein the radially inner side has a regular wave configuration, the wavy configuration extending around the entire radially inner side. The wheel of claim 1, wherein the wavy configuration is defined as a continuous wave configuration formed between the radially inner side and the spokes. The wheel of claim 1, wherein the wavy configuration is defined as a plurality of support peak configurations (ie, support portions) at each of the radially inner spoke joints, and adjacent to the support At least one auxiliary peak configuration (ie, an auxiliary portion) between the portions. The wheel of claim 1, wherein the wavy configuration comprises a plurality of recesses and projections that are continuously and alternately joined. The wheel of claim 1, wherein the wavy configuration is a smooth configuration. The wheel of claim 6, wherein the undulating configuration has a plurality of peaks and troughs, and the peaks and troughs have no angular transition. The wheel of claim 1, wherein the radially inner side is a continuous wave undulation. The wheel of claim 1, wherein at least twenty-four pairs of peaks and troughs extend radially inward of the rim. The wheel of claim 1, wherein the radially inner side has A regular wave configuration is arranged with the same height or alternately arranged in two or more different heights. The wheel of claim 1, wherein the difference between the peaks of the wavy configuration and the radial height of the valleys is at least five millimeters. A wheel as claimed in claim 1 wherein the rim comprises a plurality of side surfaces having an annular inner portion for defining the radially inner side. The wheel of claim 12, wherein the outer cross-sectional profile of the plurality of side surfaces is located radially inward of the rim and has a radius of at least five millimeters. The wheel of claim 1, wherein the peak of the wavy configuration is included in a radially innermost radially innermost point, and the trough of the wavy configuration is radially outermost on the radially inner side. The point. The wheel of claim 14, wherein the radial distance is increased by either of the radially innermost edges toward the radially innermost edge of the radially inner side to form a convex on the wheel plane. structure. A bicycle has at least one of the wheels described in any of the above patent applications. A wheel for a bicycle, comprising: a hub for mounting the wheel to the bicycle; and a rim assembling a tire, the rim having a radially inner side and a plurality of side surfaces that are in contact with the radially inner side a plurality of spokes extending between the hub and the rim; wherein at least the radially inner portion has a wavy configuration, and wherein an outer cross-sectional profile of the plurality of lateral sides of the rim radially inner side, Has a radius of at least five millimeters. The wheel of claim 17, wherein the radial distance of the wavy configuration varies between peaks and troughs, and the difference between the peaks and valleys of the wavy configuration is at least five Millimeter. The wheel of claim 17, wherein the rim is made of a synthetic material. The wheel of claim 17, wherein the rim has a plurality of side surfaces that are bent laterally outward from the base of the rim and then on a radially inner edge of the rim Bend from side to side before joining. The wheel of claim 17, wherein the outer cross-sectional profile of the plurality of side surfaces is located radially inward of the rim and has a radius of at least ten millimeters. A wheel as claimed in claim 17 wherein at least twenty-four pairs of peaks and troughs extend radially inward of the rim.