Windbreaker rim, wheel and bicycle

Abstract

The present invention provides a wind-breaking rim and wheel as well as a bicycle. The wind-breaking rim includes an outer rim tire mounting portion for mounting a tire, an inner rim spoke mounting portion for mounting spokes, and two rim side walls relatively arranged between the outer rim tire mounting portion and the inner rim spoke mounting portion. The wind-breaking rim also includes a plurality of rim wave shapes, which are all extended from the inner rim spoke mounting portion to the two rim side walls and are symmetrically distributed with the rim width center plane as the symmetry plane. The plurality of rim wave shapes are continuously arranged to form an annular wind-breaking structure, and the rim wave shape includes adjacent wave crests and wave troughs. The wave-shaped rim inner rim and rim side walls can change the flow direction of the wind during riding, so that the airflow flows out along the wave-shaped side walls, which can greatly reduce the wind resistance, and the appearance is novel and beautiful.

Description

Technical Field

[0001] The invention relates to the field of vehicle accessories, in particular to a windbreaker rim. Background Art

[0002] The bicycle wheel is the main component of the bicycle, and the rim is the main body of the bicycle wheel and the supporting part of the bicycle. Existing bicycle rims mainly include stainless steel and carbon fiber rims. Carbon fiber rims are made of carbon yarns impregnated with resin and placed in the shape of the rim into a mold (an auxiliary tool for shaping the rim during the rolling process) and then subjected to high temperature, pressure, shaping and curing for a period of time (a process in which the rolled product is subjected to high temperature and high pressure in the mold cavity to react and shape it). Bicycle rims usually include a tire mounting part for mounting a tire and in an annular shape, a spoke mounting part for mounting spokes and in an annular shape, and two annular side walls relatively arranged between the tire mounting part and the spoke mounting part. At present, the two annular side walls of the prior art usually adopt a common curve design, and the inner spoke mounting part is a smooth circle, such as CN104070924A. Although the design and process of this rim are simple, the wind resistance is large and it cannot achieve a good wind-breaking effect. In recent years, there have also been two annular side walls with a wavy structure design, such as CN218577408U. Although it can play a role in reducing wind resistance to a certain extent, how to manufacture products that can further reduce the wind resistance of the rim has always been the pursuit of the industry. Summary of the invention

[0003] Therefore, in view of the above problems, the present invention provides a wind-breaking rim and wheel as well as a bicycle.

[0004] The present invention is implemented by the following scheme:

[0005] The present invention proposes a wind-breaking rim, comprising an outer ring tire mounting portion for mounting a tire, an inner ring spoke mounting portion for mounting spokes, and two rim side walls relatively arranged between the outer ring tire mounting portion and the inner ring spoke mounting portion, the wind-breaking rim having a rim width center plane in the rim width direction, and is characterized in that the wind-breaking rim also includes a plurality of rim wave shapes, the plurality of rim wave shapes all extend from the inner ring spoke mounting portion to the two rim side walls and are symmetrically distributed with the rim width center plane as the symmetry plane, and the plurality of rim wave shapes are continuously arranged to form an annular wind-breaking structure, and the rim wave shape includes adjacent crests and troughs.

[0006] In one embodiment, the rim wave shape extends from the inner ring spoke mounting portion to the rim side wall, thereby forming a concave and convex wave surface on both the inner ring spoke mounting portion and the rim side wall, wherein the inner ring wave surface of the inner ring spoke mounting portion includes adjacent inner ring wave peaks and inner ring wave troughs, and the side wall wave surface of the rim side wall includes adjacent side wall wave peaks and side wall wave troughs, and the side wall wave peaks are connected to the inner ring wave peaks, and the side wall wave troughs are connected to the inner ring wave troughs.

[0007] In one embodiment, the windbreaker ring has a central axis of rotation, the peak line of the side wall wave peak portion is a radial arc curve around the central axis, the valley line of the side wall wave trough portion is a radial arc curve around the central axis, and the radial arc curve is a part of a logarithmic spiral or a part of a parabola.

[0008] In one embodiment, the peak line of the sidewall wave peak portion and the valley line of the sidewall wave valley portion extend from the inner ring spoke mounting portion to the outer ring tire mounting portion, and the height of the sidewall wave peak portion gradually decreases in the process of extending from the inner ring spoke mounting portion to the outer ring tire mounting portion, and the depth of the sidewall wave valley portion gradually decreases in the process of extending from the inner ring spoke mounting portion to the outer ring tire mounting portion.

[0009] In one embodiment, the height of the sidewall wave crest portion is reduced to zero at the outer ring tire mounting portion, and the depth of the sidewall wave trough portion is reduced to zero at the outer ring tire mounting portion.

[0010] In one embodiment, each spoke mounting hole is located at the crest of the inner ring.

[0011] In one embodiment, the outer ring tire mounting portion, the inner ring spoke mounting portion and the two rim side walls form a cavity, and the four are integrally formed.

[0012] In one embodiment, the outer ring tire mounting portion, the inner ring spoke mounting portion and the two rim side walls are all made of carbon fiber material.

[0013] The present invention also proposes a wheel, comprising the aerodynamic rim as described above, and also comprising a hub and a plurality of spokes, wherein the hub is located in the middle of the aerodynamic rim, one end of each spoke is respectively connected to or integrally formed with the hub, and the other end of each spoke is respectively connected to or integrally formed with the inner ring spoke mounting portion.

[0014] The present invention also provides a bicycle, comprising the wheel as described above.

[0015] The technical solution provided by the present invention has the following technical effects:

[0016] 1. The inner ring spoke mounting portion of the present invention is provided with a plurality of rim wave shapes. The plurality of rim wave shapes extend from the inner ring spoke mounting portion to the two rim side walls and are symmetrically distributed with the rim width center plane as the symmetry plane, and the plurality of rim wave shapes are continuously arranged to form an annular wind-breaking structure. The ripple-shaped rim inner ring and rim side walls can change the flow direction of the wind during riding, so that the airflow flows out along the ripple-shaped side walls, which can greatly reduce wind resistance, and has a novel and beautiful appearance.

[0017] 2. The wave shape of the rim of the present invention extends from the inner ring spoke mounting portion to the rim side wall, thereby forming a concave and convex wave surface on both the inner ring spoke mounting portion and the rim side wall, wherein the inner ring wave surface of the inner ring spoke mounting portion includes adjacent inner ring wave peaks and inner ring wave troughs, and the side wall wave surface of the rim side wall includes adjacent side wall wave peaks and side wall wave troughs, and the side wall wave peaks are connected to the inner ring wave peaks, and the side wall wave troughs are connected to the inner ring wave troughs, the peak line of the side wall wave peaks is a radial arc curve around the central axis, the valley line of the side wall wave troughs is a radial arc curve around the central axis, and the radial arc curve is a part of a logarithmic spiral or a part of a parabola, so that the airflow flows out along the wavy side wall more smoothly, which can further reduce wind resistance.

[0018] 3. The height of the sidewall peak portion of the present invention gradually decreases during the process of extending from the inner ring spoke mounting portion to the outer ring tire mounting portion, until the height of the sidewall peak at the outer ring tire mounting portion is reduced to the minimum, and the depth of the sidewall trough portion gradually decreases during the process of extending from the inner ring spoke mounting portion to the outer ring tire mounting portion, until the depth of the sidewall trough at the outer ring tire mounting portion is reduced to the minimum. With this arrangement, the peaks and troughs at the outer ring tire mounting portion are smoother, or even zero, so that the wind resistance at the outer ring tire mounting portion is greatly reduced, which can further reduce the overall wind resistance of the rim.

[0019] 4. The side wall of the windbreaker rim of the present invention is wavy and twisted, so that the cross-section of the side wall of the rim is formed with multiple arched protrusions. Compared with the control rim whose side surface is not wavy and twisted, that is, the side surface of the rim is flat, the load-bearing rigidity of the side wall of the windbreaker rim can be greatly improved, while the material and weight of the side wall of the rim are almost not increased or only slightly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional picture of the broken windmill circle;

[0021] Figure 2 yes Figure 1 View of the windmill circle in the middle X direction;

[0022] Figure 3 yes Figure 1View of the windmill ring in the middle Y direction;

[0023] Figure 4 yes Figure 2 Enlarged view of point C in the middle;

[0024] Figure 5 yes Figure 2 Cross-section at HH;

[0025] Figure 6 It is the front view of the wheel;

[0026] Figure 7 yes Figure 4 Enlarged view of point D in the middle;

[0027] Figure 8 yes Figure 2 The cross-section at AA in the middle corresponds to the position of the inner circle wave crest;

[0028] Fig. 9 yes Figure 2 The cross-section rotation diagram at the middle BB corresponds to the position of the inner circle trough;

[0029] Fig.10 This is a simulation diagram of the wind speed on the surface of the windbreaker circle at 20km / h;

[0030] Fig.11 This is a simulation diagram of wind speed on the surface of the control rim at 20km / h;

[0031] Fig.12 This is a simulation diagram of the wind speed on the surface of the windbreaker circle at 75km / h;

[0032] Fig.13 This is a simulation diagram of wind speed on the surface of the control rim at 75km / h;

[0033] Fig.14 It is an equivalent schematic diagram of the rim sidewall cross section of the windbreaker rim;

[0034] Fig.15 It is an equivalent schematic diagram of the rim sidewall cross section of the control rim;

[0035] Fig.16 Schematic diagram of the equivalent thickness formed by the rim sidewall of the windbreaker rim;

[0036] Fig.17 This is a picture of the test machine used to test the rigidity of the rim sidewall;

[0037] Fig.18 This is the deformation test result of the side wall of the windbreaker rim under a load of 5.3KG;

[0038] Fig.19 This is a graph showing the deformation test results of the sidewall of the control rim under a load of 5.3KG. DETAILED DESCRIPTION

[0039] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0040] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0041] like Figure 1-9 As shown, the present invention provides a windbreaker rim 10, comprising an outer ring tire mounting portion 11 for mounting a tire, an inner ring spoke mounting portion 12 for mounting spokes, and two rim side walls 13 relatively arranged between the outer ring tire mounting portion 11 and the inner ring spoke mounting portion 12, wherein the outer ring tire mounting portion 11, the inner ring spoke mounting portion 12 and the two rim side walls 13 enclose a cavity. Preferably, the four are integrally formed and made of carbon fiber material. The windbreaker rim 10 also includes a plurality of rim wave shapes 102. The rim wave shape 102 includes adjacent wave crests (1211, 1311) and wave troughs (1212, 1312). The windbreaker rim 10 has a rim width center plane 101 in the rim width direction, and the plurality of rim wave shapes 102 all extend from the inner ring spoke mounting portion 12 to the two rim side walls 13 and are symmetrically distributed with the rim width center plane 101 as a symmetry plane, as shown in FIG. Figure 1-5 As shown, a plurality of the rim wave shapes 102 are continuously arranged to form an annular wind-breaking structure. The wave-shaped inner ring of the rim and the rim side wall can change the direction of the wind during riding, so that the airflow flows out along the wave-shaped side wall, which can greatly reduce wind resistance and has a novel and beautiful appearance.

[0042] The rim wave shape 102 extends from the inner ring spoke mounting portion 12 to the rim side wall 13, so that the inner ring spoke mounting portion 12 and the rim side wall 13 form a concave-convex wave surface, wherein the inner ring wave surface 121 of the inner ring spoke mounting portion 12 includes adjacent inner ring wave crests 1211 and inner ring wave valleys 1212 (the boundary line between the inner ring wave crests 1211 and the inner ring wave valleys 1212 can be referred to Figure 4 The side wall wave surface 131 of the rim side wall 13 includes adjacent side wall wave crests 1311 and side wall wave valleys 1312, and the side wall wave crests 1311 are connected to the inner rim wave crests 1211, and the side wall wave valleys 1312 are connected to the inner rim wave valleys 1212. The windbreaker rim has a central axis of rotation O, such as Figure 2-3 and Figure 6As shown, the peak line of the side wall wave peak portion 1311 of the side wall wave surface 131 is a radial arc curve around the central axis O, as shown in FIG. Figure 7 As shown in the middle curve E. The valley line of the side wall valley portion 1312 is also a radial arc curve around the central axis O, as shown in FIG. Figure 7 As shown by the middle curve F; the radial arc curve in this embodiment is a part of the logarithmic spiral. Of course, in other embodiments, the radial arc curve can also be a part of a parabola or other types of radial arc curves, or can also be other types of curves such as non-radial arc curves. The peak line and valley line of the radial arc curve make the airflow flow out along the wave-shaped side wall more smoothly, which can further reduce wind resistance.

[0043] In addition, the number of the rim wave shapes 102 and the spacing between adjacent rim wave shapes 102 can be adjusted according to specific circumstances, including different numbers of spokes, different rim diameters or different drag reduction coefficients.

[0044] The peak line of the sidewall peak portion 1311 and the valley line of the sidewall trough portion 1312 extend from the inner ring spoke mounting portion 12 to the outer ring tire mounting portion 11. The height of the sidewall peak portion 1311 gradually decreases in the process of extending from the inner ring spoke mounting portion 12 to the outer ring tire mounting portion 11, until the height of the sidewall peak portion 1311 at the outer ring tire mounting portion 11 is reduced to a minimum. Optionally, the height of the sidewall peak portion 1311 at the outer ring tire mounting portion 11 is reduced to zero. The depth of the sidewall trough portion 1312 gradually decreases in the process of extending from the inner ring spoke mounting portion 12 to the outer ring tire mounting portion 11, until the depth of the sidewall trough portion 1312 at the outer ring tire mounting portion 11 is reduced to a minimum. Optionally, the depth of the sidewall trough portion 1312 at the outer ring tire mounting portion 11 is reduced to zero. Such an arrangement makes the wave crests and wave troughs at the outer ring tire mounting portion 11 more gentle, or even zero, so that the wind resistance at the outer ring tire mounting portion 11 is greatly reduced, and the overall wind resistance of the wheel rim can be further reduced.

[0045] like Figure 6-7 As shown, the inner ring wave crest 1211 is the position of the spoke mounting hole, that is, the number of crests of the inner ring wave crest 1211 is equal to the number of spoke mounting holes, and each spoke mounting hole is respectively located at the inner ring wave crest 1211 position of the inner ring wave surface 121. Such an arrangement enables the wheel rim to have a better force distribution after the spokes are installed, which can effectively extend the service life of the wheel rim and make the wheel rim more beautiful. Optionally, the air nozzle is arranged at the position of the inner ring wave trough 1212.

[0046] like Figure 10-13As shown, the wind resistance test of the wind-breaking rim 10 provided by the present invention and the control rim with non-wavy twisted rim side, i.e., flat rim side, was conducted at wind speeds of 20 km / h and 75 km / h, respectively, by Fluent simulation software. At the same time, the maximum wind speeds of the wind-breaking rim 10 and the control rim at wind speeds of 20 km / h and 75 km / h, respectively, were simulated by Fluent simulation software, and the rim drag coefficient results were obtained as shown in the following table:

[0047]

[0048]

[0049] It can be clearly seen that at wind speeds of 20 km / h and 75 km / h, the windbreaker rim has a lower drag coefficient, and the drag coefficient of the windbreaker rim is reduced by 7.17% and 8.13% respectively relative to the control rim. That is, the windbreaker rim 10 with the above-mentioned shape can significantly and effectively reduce wind resistance.

[0050] like Figure 10-13 As shown in the figure, the maximum wind speeds of the windbreaker rim 10 and the control rim at wind speeds of 20km / h and 75km / h were simulated by Fluent simulation software. The maximum wind speed of the windbreaker rim at 20km / h was 28.4km / h, and the maximum wind speed of the control rim was 28.3km / h; the maximum wind speed of the windbreaker rim at 75km / h was 108km / h, and the maximum wind speed of the control rim was 106.9km / h. That is, the maximum wind speed of the windbreaker rim surface is greater than that of the control rim, that is, the windbreaker rim surface has a greater dynamic pressure, and the drag coefficient is inversely proportional to the dynamic pressure, so the windbreaker rim has a smaller drag coefficient, so the windbreaker rim has a smaller air resistance.

[0051] In addition, since the rim side wall 13 of the windbreaker rim 10 is in a wave-shaped twist shape, a cross section of the rim side wall 13 is formed with a plurality of arch-shaped protrusions, such as Figure 8-9 As shown; Due to the presence of the arched protrusion, such as Fig.14 As shown, when the wavy twisted rim side wall 13 is subjected to a load F, the cross section of the rim side wall 13 is equivalent to an arch bridge shape as shown on the right side of the arrow, and the bearing rigidity is high; compared with the control rim whose rim side is not wavy twisted, that is, the rim side is flat, as shown in FIG. Fig.15 As shown, when the rim sidewall of the control rim is subjected to load F, the cross-section of the rim sidewall is equivalent to a plane shape as shown on the right side of the arrow. Compared with the rim sidewall 13 of the windbreaker rim 10, the rim sidewall of the control rim has lower bearing rigidity. Fig.16As shown, the cross section of the rim side wall 13 is formed with a plurality of arch-shaped protrusions, which is approximately equivalent to increasing the thickness of the rim side wall 13 to S. In fact, the material and weight of the rim side wall 13 are hardly increased or only slightly increased, and the bearing rigidity of the rim side wall of the windbreaker rim 10 can be greatly improved. For details, please refer to the test on the bearing rigidity of the rim side wall as described below.

[0052] like Figure 14-16 As shown, the side walls of the windbreaker rim 10 and the control rim are pressed down by the test machine, and the deformation of the side walls is recorded. The load-bearing rigidity data of the side walls of the rim are obtained by the test as follows:

[0053]

[0054] It can be clearly seen that when a load of 5.3 kg is applied to the sidewalls of the windbreaker rim and the control rim, the windbreaker rim has a lower deformation, and the rigidity of the windbreaker rim is increased by 31.6% compared with the control rim. That is, the windbreaker rim 10 with the above-mentioned shape can significantly and effectively improve the load-bearing rigidity of the rim sidewall.

[0055] like Figure 6-7 As shown, the present invention provides a wheel, including the windbreaker rim 10 described above, and also including a hub 30 and a plurality of spokes 20, wherein the hub 30 is located in the middle of the windbreaker rim 10, one end of each spoke 20 is respectively connected to or integrally formed with the hub 30, and the other end of each spoke 20 is respectively connected to or integrally formed with the inner ring spoke mounting portion 12.

[0056] In this embodiment, preferably, the spokes 20 and / or the hub 30 are made of carbon fiber material.

[0057] The present invention provides a bicycle, comprising the wheels described in the present invention, wherein one or both of the front and rear wheels are provided with a wind-breaking wheel along the forward direction.

[0058] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A windbreaker rim, comprising an outer rim tire mounting portion for mounting a tire, an inner rim spoke mounting portion for mounting spokes, and two rim side walls arranged relatively between the outer rim tire mounting portion and the inner rim spoke mounting portion, wherein the windbreaker rim has a rim width center plane in the rim width direction, and is characterized in that: The wind-breaking rim also includes a plurality of rim wave shapes, and the plurality of rim wave shapes all extend from the inner rim spoke mounting portion to the two rim side walls and are symmetrically distributed with the rim width center plane as the symmetry plane, and the plurality of rim wave shapes are continuously arranged to form an annular wind-breaking structure, and the rim wave shape includes adjacent crests and troughs.

2. The windbreaker rim according to claim 1, characterized in that: The rim wave shape extends from the inner ring spoke mounting portion to the rim side wall, thereby forming a concave and convex wave surface on both the inner ring spoke mounting portion and the rim side wall, wherein the inner ring wave surface of the inner ring spoke mounting portion includes adjacent inner ring wave peaks and inner ring wave troughs, and the side wall wave surface of the rim side wall includes adjacent side wall wave peaks and side wall wave troughs, and the side wall wave peaks are connected to the inner ring wave peaks, and the side wall wave troughs are connected to the inner ring wave troughs.

3. The windbreaker rim according to claim 2, characterized in that: The windbreaker rim has a central axis of rotation, the peak line of the side wall wave peak portion is a radial arc curve around the central axis, the valley line of the side wall wave trough portion is a radial arc curve around the central axis, and the radial arc curve is a part of a logarithmic spiral or a part of a parabola.

4. The windbreaker rim according to claim 2, characterized in that: The peak line of the sidewall wave peak portion and the valley line of the sidewall wave valley portion extend from the inner ring spoke mounting portion to the outer ring tire mounting portion, and the height of the sidewall wave peak portion gradually decreases in the process of extending from the inner ring spoke mounting portion to the outer ring tire mounting portion, and the depth of the sidewall wave valley portion gradually decreases in the process of extending from the inner ring spoke mounting portion to the outer ring tire mounting portion.

5. The windbreaker rim according to claim 4, characterized in that: The height of the sidewall wave crest portion is reduced to zero at the outer ring tire mounting portion, and the depth of the sidewall wave trough portion is reduced to zero at the outer ring tire mounting portion.

6. The windbreaker rim according to claim 2, characterized in that: Each spoke mounting hole is located at a position of the inner ring wave crest portion.

7. The windbreaker rim according to claim 1, characterized in that: The outer ring tire mounting portion, the inner ring spoke mounting portion and the two wheel rim side walls form a cavity, and the four are integrally formed.

8. The windbreaker rim according to claim 7, characterized in that: The outer ring tire mounting portion, the inner ring spoke mounting portion and the two wheel rim side walls are all made of carbon fiber material.

9. A wheel, comprising the windbreaker rim as described in any one of claims 1 to 8, and further comprising a hub and a plurality of spokes, wherein the hub is located in the middle of the windbreaker rim, one end of each spoke is respectively connected to or integrally formed with the hub, and the other end of each spoke is respectively connected to or integrally formed with the inner ring spoke mounting portion.

10. A bicycle, characterized in that: Comprising a wheel as claimed in claim 9.

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