CN110549786A - Bicycle wheel set - Google Patents

Abstract

The present invention discloses a bicycle wheel set, comprising: wheel frame, shaft and N group spoke groups. Each spoke set has four spokes. The wheel frame is connected with the wheel shaft through the spoke set. Therefore, the side wind resistance can be reduced, and the bicycle can easily maintain the speed and the stability of the bicycle body.

Description

bicycle wheel set

technical field

The present invention relates to a wheelset, especially a bicycle wheelset.

Background technique

Wind resistance is one of the biggest enemies of all racing sports, especially in the field of bicycles, because the competition is entirely based on human power, reducing wind resistance can significantly increase speed and stability.

The attitude of the bicycle frame during travel is fixed, and it is easy to quickly obtain improved data from wind tunnel tests. Most bicycle manufacturers are willing to invest in the research and development of bicycle frames. However, the wind resistance of the spokes of the bicycle wheel set is dynamic during travel. The wind is non-directional and comes from any angle in all directions. Different wind resistance data will be generated at different speeds and different wind shear angles. Most bicycle manufacturers do not I am willing to spend my time on the weaving method of spokes to make breakthroughs and designs, because the process is very expensive and time-consuming, and requires huge financial support and continuous testing to get results.

Referring to FIG. 1 , it is a front view of the first shape of the existing bicycle wheel set. The existing bicycle wheel set of this first shape has a wheel frame 90 radiating a plurality of spokes 91 toward the axis, and the plurality of spokes 91 are arranged at equal distances and at equal angles.

Referring to FIG. 2 , it is a front view of the second shape of the existing bicycle wheel set. The existing bicycle wheel set of this second shape has a plurality of spokes 92 radiating from the wheel frame 90 to the shaft center, and the plurality of spokes 92 are connected to the shaft center at different angles, but the plurality of spokes maintain an equal distance between them and are opposite to each other. The crossed spokes 92 are in overlapping contact with each other.

The wind resistance of different spoke weaving methods does have a certain impact on the riding speed through wind tunnel testing, which is related to the stability of the rider and the car body itself. Therefore, it is still necessary to further improve the design of bicycle wheels to reduce wind resistance.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a bicycle wheel set, which can reduce wind resistance, improve the efficiency and stability of bicycle travel, reduce the rider's riding fatigue, and increase the overall bicycle travel safety.

Another object of the present invention is to provide a bicycle wheel set, when the rider uses the same power output, the rider can save more energy consumption.

Another object of the present invention is to provide a bicycle wheel set capable of reducing wind disturbance caused by non-positive wind.

Another object of the present invention is to provide a bicycle wheel set capable of reducing the overall wind resistance.

In order to achieve the foregoing and other inventive purposes, the present invention provides a bicycle wheel set, comprising: a bicycle wheel set, comprising: a wheel frame; an axle; and N groups of spoke groups, each of which has four spokes, and N is A natural number greater than or equal to 3, the wheel frame is connected to the wheel axle through the N groups of spoke groups.

In an embodiment of the present invention, each spoke group is staggered with adjacent spoke groups, respectively.

In an embodiment of the present invention, the N-th spoke group is interleaved with the N-1-th, N-2-th, and N+1-th, N+2-th spoke groups.

In an embodiment of the present invention, the 3rd and 4th spokes of the Nth group of spokes are interleaved with the 1st and 2nd spokes of the N+1th group, and the 3rd and 4th spokes of the Nth group of spokes are staggered. 4 spokes staggered with 1st and 2nd spokes of group N+2, 1st and 2nd spokes of group N spoke group staggered with 3rd and 4th spokes of group N-1 , the 1st and 2nd spokes of group N are interleaved with the 3rd and 4th spokes of group N-2.

In an embodiment of the present invention, the four spokes of each group of spoke groups are further divided into the first side group spokes and the second side group spokes, the first side group spokes, the second side group spokes The spokes each contain two spokes.

In an embodiment of the present invention, the first side group spokes of the Nth group of spoke groups, the first side group spokes of the N-1th group of spoke groups, and the N-2th group of spokes of the first side group The spokes are set on one side, and one spoke is staggered.

In an embodiment of the present invention, the second side group spokes of the Nth group of spoke groups, the second side group spokes of the N-1th group of spoke groups, and the N-2th group of spokes of the second side group The spokes of the two side groups are staggered with one spoke.

In an embodiment of the present invention, each of the spoke groups is not in contact with the adjacent spoke groups, respectively.

In an embodiment of the present invention, each of the spokes has a gap therebetween.

In an embodiment of the present invention, the number of the spoke groups is six.

Description of drawings

FIG. 1 is a front view of the first shape of the existing bicycle wheel set.

FIG. 2 is a front view of the second shape of the existing bicycle wheel set.

FIG. 3 is a schematic diagram of the direction and angle of the bicycle wheel set in the wind tunnel test according to the embodiment of the present invention.

FIG. 4 is an assembled front view of the bicycle wheel set according to the embodiment of the present invention.

FIG. 5 is a combined perspective view of a bicycle wheel set according to an embodiment of the present invention.

FIG. 6 is a partial enlarged view of the assembled front view of the bicycle wheel set according to the embodiment of the present invention.

FIG. 7 is a view taken along the line X-X of FIG. 6 .

FIG. 8 is a partial enlarged view of the center of the assembled front view of the bicycle wheel set according to the embodiment of the present invention.

FIG. 9 is an enlarged perspective view of an assembled part of a bicycle wheel set according to an embodiment of the present invention.

FIG. 10 is a line diagram comparing the test data of the embodiment of the present invention and the existing bicycle wheel set.

Detailed ways

The following detailed description will refer to representative embodiments in the accompanying drawings, wherein similar or identical components are provided with the same reference numerals. The embodiments described below are intended to cover alternative embodiments, modifications or equivalents within the spirit and scope of the embodiments as defined by the scope of the appended claims. It should be understood that the directional terms mentioned in the present invention are only used to describe the present invention with reference to the directions of the drawings, and are not used to limit the present invention. In addition, when the following description describes a feature, component or means in one embodiment, those skilled in the art will use their knowledge to consider that the feature, component or means are implemented in other undescribed embodiments as equivalent; Certain features described in the embodiments can also be implemented in other embodiments individually or in combination; conversely, various features described in the context of multiple embodiments can also be implemented separately or in any suitable subcombination in other embodiments. implemented in a single or multiple embodiments.

Referring to FIGS. 4 and 5 , FIG. 4 is a combined front view of a bicycle wheel set according to an embodiment of the present invention, and FIG. 5 is a combined perspective view of a bicycle wheel set according to an embodiment of the present invention. The bicycle wheel set according to the embodiment of the present invention includes a wheel frame 20 , an axle 10 and N sets of spoke sets (for example, six sets of spoke sets A to F shown in FIG. 4 ). Wherein, each spoke group of the N spoke groups has four spokes 30 . The wheel frame 20 is connected to the wheel axle 10 through the N spoke sets, wherein N is a natural number greater than or equal to 3. In this implementation, as shown in the figure, there are a total of six groups of spoke groups A, spoke groups B, spoke groups C, spoke groups D, spoke groups E and spoke groups F, etc. The number of the spoke groups is preferably six groups , and the four spokes 30 of each spoke group are centrally arranged so that each adjacent spoke group is clearly separated.

The spirit of the embodiment of the present invention is that, by means of N groups of spoke groups each having four spokes 30, the bicycle wheel set disclosed in the embodiment of the present invention can generate a "face" air wall, and the air wall is not connected to the outside air. The air pressure difference can form a protective surface, thereby reducing the wind disturbance of the non-positive wind, thereby reducing the overall wind resistance, reducing the riding fatigue of the rider, and increasing the overall safety of the bicycle.

The spirit of the embodiment of the present invention is that, with N groups of spoke groups each having four spokes 30, no matter whether the spoke groups are staggered or not, due to the structural design of the "four" spokes 30 of the "group" , which can generate a protective surface of the air, thereby reducing the wind disturbance of the non-positive wind, thereby reducing the overall wind resistance, reducing the riding fatigue of the rider, and increasing the overall safety of the bicycle.

The details of the air protection surface that can be generated by N groups of spoke groups each having four spokes 30 according to the embodiment of the present invention are described as follows:

Referring to FIGS. 6 and 7 , FIG. 6 is an enlarged partial front view of the assembled bicycle wheel set according to an embodiment of the present invention, and FIG. 7 is a view taken along the direction X-X of FIG. 6 . Since the spokes 30 are numerous and interlaced, only the spoke group A, the spoke group B, and the spoke group C are shown in FIG. 6 for illustration. The four spokes 30 of the spoke group A are, in a clockwise order, spoke a1 , spoke a2 , spoke a3 and spoke a4 . The four spokes 30 of the spoke group B are, in a clockwise order, a spoke b1 , a spoke b2 , a spoke b3 and a spoke b4 . The four spokes 30 of the spoke group C are, in a clockwise order, a spoke c1 , a spoke c2 , a spoke c3 and a spoke c4 .

As shown in FIG. 6, each spoke set is staggered with the adjacent spoke set, respectively. That is, spoke set A is staggered with spoke set B, and spoke set B is staggered with spoke set C. In the present invention, the adjacent spoke groups and the staggered spoke groups refer to that at least one of the four spokes 30 of each spoke group is staggered with each other in the front view direction.

The front-view direction refers to the front-view direction based on the drawing.

The staggering method is: the 3rd and 4th spokes of the N group of spokes are staggered with the 1st and 2nd spokes of the N+1 group, and the 3rd and 4th spokes of the Nth group of spokes are staggered with 1st and 2nd spokes in group N+2 are staggered, 1st and 2nd spokes in group N are staggered with 3rd and 4th spokes in group N-1, group N The 1st and 2nd spokes of the spoke set are staggered with the 3rd and 4th spokes of the N-2 set.

Taking FIGS. 6 and 8 as an example, the spokes a3 and a4 of the spoke group A and the spokes b1 and b2 of the spoke group B are staggered with each other in the front view direction, and the spokes a3 and a4 of the spoke group A and the spoke c1 of the spoke group C are staggered. , The spokes c2 are staggered with each other in the front view direction, the spokes a1 and a2 of the spoke group A and the spokes f3 and f4 of the spoke group F are staggered with each other in the front view direction, the spokes a1 and a2 of the spoke group A and the spoke group E are staggered. The spokes e3 and e4 are staggered with each other in the front view direction.

More preferably, the four spokes 30 of each group of spoke groups are further divided into the first side group spokes S1 and the second side group spokes S2, the first side group spokes S1 and the second side group spokes S1 and the second side group spokes. Each of the spokes S2 includes two spokes 30 . Referring to FIG. 7 , taking the spoke group A as an example, the spokes a1 and a3 of the spoke group A are located in the first side group spoke S1 (the left side of the drawing), and the spokes a2 and a4 of the spoke group A are located in the second side group. The spokes S2 (the right side of the drawing), whereby the four spokes 30 of the spoke group A are staggered on the left and right sides of the axle 10, so that the tension and stress are evenly dispersed. And there is a gap g between the spokes 30 and the spokes 30, and the spokes 30 do not contact each other so that the gas can pass through the gap g. In the structural design of the "four" spokes 30 of the "group", it can be While generating an air protection surface, it can also avoid overlapping contact points to form a single larger cross-sectional area, thereby reducing wind resistance.

More preferably, the N th set of spokes is interleaved with the spoke sets of the N-1 th set, the N-2 th set and the N+1 th set and the N+2 th set. Referring to FIG. 8 , it is a partial enlarged view of the center of the assembled front view of the bicycle wheel set of the present invention. The N-th group of spoke groups is taken as an example of the spoke group A, then the N-1th group is the spoke group F, the N-2th group is the spoke group E, the N+1th group is the spoke group B, and the N+2th group is the spoke group. For spoke set C.

Referring to FIG. 8 , the spokes a1 and a2 of the N-th spoke group A are interleaved with the spokes f3 and f4 of the N-1 spoke group F, and the spokes a1 and a2 of the N-th spoke group A are interlaced with the N-th spoke group A. -The spokes e3 and e4 of the 2 spoke groups E are staggered, the spokes a3 and a4 of the N spoke group A are staggered with the spokes b1 and b2 of the N+1 spoke group B, and the spokes b1 and b2 of the N spoke group A are staggered. The spokes a3 and a4 are staggered with the spokes c1 and c2 of the N+2 spoke group C. Thereby, each spoke group is partially staggered with the adjacent spoke group and the spoke group separated by a spoke group, so that the tension and stress can be uniformly dispersed.

Among them, the first side group spokes S1 of the Nth group of spoke groups, the first side group spokes S1 of the N-1th group of spoke groups, and the first side group of the N-2th group of spoke groups. The spokes S1 each have a spoke 30 staggered. Referring to the foregoing description, odd-numbered spokes such as spokes a1, a3, b1, b3, etc. of each spoke group are located in the spoke S1 of the first side group. On the second side group spoke S2. 8 , the spoke a1 of the N-th spoke group A is staggered with the spoke f3 of the N-1 th spoke group F, and is staggered with the N-2 spoke group E of the spoke e3. In this way, each spoke group has a spoke 30 interlaced with the adjacent spoke group and the spoke group separated by a spoke group, so that the tension and stress can be uniformly dispersed.

Among them, the second side group spokes S2 of the Nth group of spoke groups, the second side group spokes S2 of the N-1th group of spoke groups, and the second side group of the N-2th group of spoke groups. The spokes S2, each have a spoke 30 staggered. Referring also to FIG. 8 , the spoke a2 of the N-th spoke set A is staggered with the spoke f4 of the N-1 th spoke set F, and is staggered with the N-2 spoke set E of the spoke e4. In this way, each spoke group has a spoke 30 interlaced with the adjacent spoke group and the spoke group separated by a spoke group, so that the tension and stress can be uniformly dispersed.

Referring to FIG. 9 , it is an enlarged perspective view of an assembled part of a bicycle wheel set according to an embodiment of the present invention. As shown in the figure, each of the spoke groups is not in contact with the adjacent spoke groups, and each of the spokes 30 has a gap between the spokes 30 .

To sum up, the bicycle wheel set according to the embodiment of the present invention has the following characteristics:

1. Each spoke group has four spokes, and each spoke group is staggered with the adjacent spoke group.

2. Each spoke group is not in contact with the adjacent spoke group.

3. The spokes do not touch each other.

The bicycle wheel set of the embodiment of the present invention is specially commissioned by the "Cycling & Health Tech Industry R&D Center" to conduct a wind tunnel test, and the existing bicycle wheel set of FIG. 2 is subjected to the same wind tunnel test. as a comparison. The detection method is based on the wind group generated by the crosswind with a speed of 48 kilometers per hour (13.3 meters per second) and a deflection of 0 to 15 degrees on the left and right sides. This is because it is impossible for the rider to completely maintain a positive 0 degree during the riding process, and most of them are 0 to 15 degrees of left and right yaw, that is, -15 degrees to +15 degrees.

Referring to FIG. 3 , it is a schematic diagram of the direction and angle of the bicycle wheel set according to the embodiment of the present invention during the wind tunnel test. In the wind tunnel test, a test table 40 is set in the test field, and the wheel set 42 to be tested is fixed by a fixing frame 41 above the test table 40 . During the test, the wind speed is fixed at 13.3 meters per second, and the test bench 40 is switched to different angles to align the wind direction of the wind tunnel for the test, so that the tested wheel set 42 can obtain the front wind direction W0, the right side wind direction W1 and the left side respectively. The experimental data of various wind directions such as wind direction W2, the right side wind direction W1 has an angular deviation of +15 degrees compared with the front positive wind direction W0, and the left side wind direction W2 has an angular deviation of -15 degrees compared with the front positive wind direction W0, and Micro-adjust the angle of the test stand 40 to obtain the test data of +5 degrees, +10 degrees, -5 degrees and -10 degrees respectively.

The resistance table of wind resistance can be obtained from the experiment, as shown in Table 1 and Table 2.

Table 1: Wind tunnel test data of the bicycle wheel set of the present invention

Table 2: Wind Tunnel Test Data of Existing Bicycle Wheels

The above data were compared to obtain the data in Tables 3 to 4, and the line graph of the test results in FIG. 10 was produced.

FIG. 10 is a line diagram of the test result, B1-Y is the data of the bicycle wheel set according to the embodiment of the present invention, and B2-Y is the data of the existing wheel set.

Convert the resistance value in unit gram to the resistance value in unit newton. The formula can be used: Newton N=resistance value*0.0098, and Newton N*wind speed M=wattage W*second S, to obtain the value of wattage. The test value of the wind speed M is 13.3 meters per second, and the wattage W is the consumption value per second. The data in Table 3, Table 4 and Table 5 below were obtained.

Table 3: Bicycle wheel set wind tunnel test data of the embodiment of the present invention

B1 15 degrees 10 degrees 5 degrees 0 degree -5 degrees -10 degrees -15 degrees resistance value 546.48 645.54 670.38 677.38 500.76 484.94 428.87 Newton 5.35 6.32 6.56 6.63 4.9 4.75 4.2 Watts 71.15 84.05 87.42 88.17 65.17 63.17 55.86

Table 4: Wind Tunnel Test Data of Existing Bicycle Wheels

B2 15 degrees 10 degrees 5 degrees 0 degree -5 degrees -10 degrees -15 degrees resistance value 656.08 657.78 667.11 660.89 587.15 555.24 559.45 Newton 6.43 6.44 6.54 6.47 5.75 5.44 5.48 Watts 85.5 85.65 86.98 86.05 76.47 72.35 72.88

Table 5: Resistance value gap table

From the resistance value difference table in Table 5, it can be inferred that the calculated difference between the positive 15-degree angle data is 14 watts, then B1 (the embodiment of the present invention) reduces the power consumption by 14 watts per second, and the difference between the two The difference in energy consumption and speed is very obvious.

For example, with the same power output (such as 100 watts) and one hour of riding time for comparison, the difference of 14 watts per second in 60 minutes is enough to save the rider 50,400 watts of consumption. Such performance The difference clearly shows that the performance of the bicycle wheel set with the four-hole centralized spoke knitting method of the embodiment of the present invention will bring revolutionary changes to the bicycle wheel set.

For another example, taking a 100-kilometer race as an example, an amateur rider riding at a speed of 25 km/h can save a total of 201,600 watts of energy, which is a full 14% of energy consumption, compared to the existing wheel set. . In other words, the user can be one more group ahead.

Based on the foregoing description, the embodiment of the present invention uses the staggered spoke weaving method, and a “face” air wall can be formed on both sides of the wheel set. Therefore, the overall wind resistance can be reduced, and there is a gap between the spokes 30 and the spokes 30, thereby reducing the lateral wind resistance, reducing the rider's riding fatigue, and increasing the overall safety of the bicycle.

In the design of the wheel set, after deducting the height of the wheel frame 20, the remaining lateral wind resistance surface will be composed of the spokes 30, and the area generated by the spokes 30 during rotation will be several times that of the wheel frame 20. The spoke surface formed by the spokes 30 The resulting area is large, and a slight aerodynamic improvement can produce a larger anti-wind resistance effect.

The present invention has been disclosed by using the above preferred embodiments, but it is not intended to limit the present invention. Those skilled in the art to which the present invention pertains should clearly understand that the present invention is not limited to the details of the above-mentioned illustrative embodiments, the present invention may be implemented in other specific forms without departing from the basic spirit of the present invention, and the embodiments are only for illustrating the present invention. The invention is not limited to the invention. The invention is based on the scope of the claims rather than the above description. All modifications in the meaning of the scope of the claims and the equivalent scope belong to the scope of the invention.

【Symbol Description】

10 axles

20 wheel frame

30 spokes

40 test benches

41 Holder

42 Wheels tested

90 wheel frame

91 spokes

92 spokes

A to F spoke set

a1～a4 spokes

b1～b4 spokes

c1～c4 spokes

e3～b4 spokes

f1～f4 spokes

g gap

S1 first sideset spokes

S2 second sideset spokes

W0 Positive wind direction ahead

W1 right side wind direction

W2 Left side wind direction

Claims (10)

1. A bicycle wheel assembly, comprising:

A wheel frame;

A wheel axle; and

The wheel frame is connected with the wheel shaft through the N groups of spoke groups.

2. The bicycle wheelset as defined in claim 1, wherein each spoke set is staggered with respect to an adjacent spoke set.

3. The bicycle wheelset as defined in claim 2, wherein the nth group of spokes is staggered with respect to the N-1 st, N-2 nd and N +1 st, N +2 nd groups of spokes.

4. The bicycle wheelset as claimed in claim 3, wherein the 3 rd and 4 th spokes of the Nth spoke set are interlaced with the 1 st and 2 nd spokes of the (N + 1) th spoke set, the 3 rd and 4 th spokes of the Nth spoke set are interlaced with the 1 st and 2 nd spokes of the (N + 2) th spoke set, the 1 st and 2 nd spokes of the Nth spoke set are interlaced with the 3 rd and 4 th spokes of the (N-1) th spoke set, and the 1 st and 2 nd spokes of the Nth spoke set are interlaced with the 3 rd and 4 th spokes of the (N-2) th spoke set.

5. The bicycle wheelset as defined in claim 2, wherein the four spokes of each spoke set are further divided into a first side set spoke and a second side set spoke, and each of the first side set spoke and the second side set spoke comprises two spokes.

6. The bicycle wheelset as defined in claim 5, wherein the first side set spoke of the Nth spoke set is staggered with respect to the first side set spoke of the N-1 spoke set and the first side set spoke of the N-2 spoke set by one spoke.

7. The bicycle wheelset as defined in claim 5, wherein the second side group spoke of the Nth group spoke set is staggered with respect to the second side group spoke of the N-1 group spoke set and the second side group spoke of the N-2 group spoke set by one spoke.

8. The bicycle wheel set as in claim 1, wherein each of said spoke sets is out of contact with an adjacent one of said spoke sets.

9. The bicycle wheel set according to claim 8, wherein each of the spokes has a gap therebetween.

10. Bicycle wheel group according to claim 1, wherein the number of spoke groups is six.