Spoke assembly, wheel and bicycle

Abstract

The utility model relates to a spoke assembly, a wheel and a bicycle, in particular to the field of spokes, and the spoke assembly comprises a hollow metal piece and spokes connected with the hollow metal piece. At least one deformation area is arranged in the hollow metal piece; the deformation area comprises a first side face and a second side face in the axial direction of the spoke, and a deformation section located between the first side face and the second side face. The widest part of the first side surface and the narrowest part of the second side surface intersect on the same projection plane; the narrowest part of the first side surface and the widest part of the second side surface are intersected on the same projection plane; the dimension relation of the first side surface and the second side surface meets the following conditions: the widest part of the first side surface is greater than the narrowest part of the second side surface, and / or the narrowest part of the first side surface is smaller than the widest part of the second side surface. According to the spoke assembly provided by the utility model, the specific deformation area is set, the pull-off prevention performance of the spoke assembly is improved by means of multidirectional pull retardation, and the use effect of the spoke assembly is favorably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to spoke field, concretely relates to a spoke assembly, wheel, bicycle. BACKGROUND

[0002] The carbon fiber spoke usually embeds the metal piece of metal material into the both ends of the carbon fiber spoke body through the way of gluing to fix, so that the metal piece and the carbon fiber spoke body are fixed together, but the gluing technology and the bonding strength of the adhesive are required to be higher, there is the risk of degumming, and then the use stability and safety of the carbon fiber spoke are affected.

[0003] At present, in view of the defects of gluing, the strength and stability of the spoke assembly after gluing are usually further improved by changing the internal shape of the metal piece and the spoke cooperation, such as CN114919326A discloses a carbon fiber spoke, bicycle rim and bicycle, including carbon fiber spoke body, first connecting piece and second connecting piece, the both ends of the carbon fiber spoke body are integrally formed with first spiral column and second spiral column respectively, the first connecting piece is formed with first spiral hole, the second connecting piece is formed with second spiral hole, the first connecting piece and the second connecting piece are connected on the both ends of the carbon fiber spoke body through the male and female spiral cooperation of the first spiral hole and the first spiral column and the second spiral hole and the second spiral column respectively, and the peripheral wall between the first spiral column and the inner wall of the first spiral hole and the peripheral wall between the second spiral column and the inner wall of the second spiral hole are both reserved with gluing gap, and the gluing gap is filled with adhesive.

[0004] CN114290849A discloses an inner core inverted taper type carbon fiber spoke and a preparation method thereof, including a spoke made of carbon fiber, a cap and an embedded cap head, the spoke includes an inner core body and a carbon fiber prepreg, the both ends of the inner core body are respectively a first connecting end and a second connecting end, the first connecting end is provided with an inverted taper part, the cap and the embedded cap head are both provided with a penetrating mounting hole, and are respectively sleeved on the first connecting end and the second connecting end to form a coaxial structure, the carbon fiber prepreg covers the embedded cap head and the second connecting end of the inner core body and extends to the first connecting end to be integrally formed, and the inverted taper part is placed outside the carbon fiber prepreg.

[0005] However, the current spoke assembly still has the defect of poor anti-pull-out performance in use, and the current spoke assembly preparation process needs to form the spoke first, and then assemble and connect with the metal piece, which has the problem of low production efficiency. UTILITY MODEL CONTENTS

[0006] In view of the problems in the prior art, the purpose of the utility model is to provide a spoke assembly, wheel and bicycle to solve the problems of poor anti-pull-out performance of the spoke assembly in use and low production efficiency.

[0007] To achieve the purpose, the utility model discloses the following technical scheme:

[0008] In a first aspect, the utility model provides a spoke assembly, the spoke assembly includes:

[0009] Hollow metal piece, and the spoke connected with the hollow metal piece;

[0010] At least one deformation zone is arranged in the hollow metal piece;

[0011] The deformation zone includes: the first side surface and the second side surface along the spoke axial direction and the deformation section between the first side surface and the second side surface;

[0012] The widest part of the first side surface and the narrowest part of the second side surface intersect on the same projection plane;

[0013] The narrowest part of the first side surface and the widest part of the second side surface intersect on the same projection plane;

[0014] The size relationship of the first side surface and the second side surface satisfies: the widest part of the first side surface > the narrowest part of the second side surface, and / or the narrowest part of the first side surface < the widest part of the second side surface.

[0015] The spoke assembly provided by the utility model sets specific deformation zone, promotes the anti-pulling-off performance of the spoke assembly by the multidirectional pulling resistance, and is favorable for improving the use effect of the spoke assembly.

[0016] As the preferred technical scheme of the utility model, the narrowest part and the widest part of the first side surface are same, the widest part of the first side surface < the widest part of the second side surface, and the narrowest part of the first side surface > the narrowest part of the second side surface.

[0017] As the preferred technical scheme of the utility model, the cross-sectional shape of the first side surface includes circle or polygon;

[0018] As the preferred technical scheme of the utility model, the cross-sectional shape of the second side surface includes circle or polygon.

[0019] As the preferred technical scheme of the utility model, the first side surface is circle, and the second side surface is ellipse;

[0020] The long axis length of the ellipse in the second side surface > the diameter of the circle in the first side surface;

[0021] The short axis length of the ellipse in the second side surface < the diameter of the circle in the first side surface.

[0022] As the preferred technical scheme of the utility model, the hollow metal piece is closely connected with the spoke.

[0023] As the preferred technical scheme of the utility model, the length of the deformation area is less than the length of the inner spoke of the hollow metal piece.

[0024] As the preferred technical scheme of the utility model, the inner wall of the hollow metal piece is provided with recesses and / or protrusions.

[0025] In the second aspect, the utility model provides a wheel, which comprises the spoke assembly as described in the first aspect.

[0026] In the third aspect, the utility model provides a bicycle, which comprises the spoke assembly as described in the first aspect.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] The spoke assembly provided by the utility model does not use the traditional manufacturing process of first manufacturing a spoke main body and then connecting metal parts during the preparation process, but instead adopts the process of combining the metal part at the same time when the spoke main body is formed, so that the process is simplified. The process main body adopts but is not limited to a thermoplastic carbon fiber spoke main body. First, the uncured carbon fiber spoke main body is inserted into the hollow metal piece, and the hollow metal piece can be a preformed special-shaped metal piece, and then the carbon fiber spoke with the inserted hollow metal piece is placed in a mold and formed under high temperature and high pressure. The high temperature causes the carbon fiber main body material to solidify, so that the required shape and performance are obtained. The high pressure causes the hollow metal piece to deform, and the cross-sectional area of the hollow metal piece is the same at the position where the hollow metal piece contacts the material main body, and the structure is different in shape, so as to form an undercut structure and achieve the purpose of preventing pull-out. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic view of the spoke assembly provided by the utility model embodiment;

[0030] Figure 2 is a schematic view of the formation of the deformation area in the spoke assembly provided by the utility model embodiment;

[0031] Figure 3 is a schematic view of the spoke assembly provided by the utility model embodiment 1;

[0032] Figure 4 is a schematic view of the first side surface in the deformation area in the utility model embodiment 1, corresponding to Figure 3 the A-A cross section in the utility model embodiment 1;

[0033] Figure 5 is a schematic view of the second side surface in the deformation area in the utility model embodiment 1, corresponding to Figure 3 the B-B cross section in the utility model embodiment 1.

[0034] In the figure: 100 - hollow metal piece, 200 - spoke, 210 - deformation zone, 220 - first side, 230 - second side.

[0035] The utility model is further described in detail below. However, the examples described below are only simple examples of the utility model and do not represent or limit the protection scope of the utility model. The protection scope of the utility model is subject to the claims. DETAILED DESCRIPTION

[0036] To better illustrate the utility model and facilitate understanding of the technical solutions of the utility model, the typical but non-limiting embodiments of the utility model are as follows:

[0037] The embodiment provides a spoke assembly, as shown in the figure, the spoke assembly comprises: Figure 1

[0038] A hollow metal piece 100 and a spoke 200 connected with the hollow metal piece 100;

[0039] At least one deformation zone 210 is arranged in the hollow metal piece 100;

[0040] The deformation zone 210 comprises a first side 220 and a second side 230 in the axial direction of the spoke 200 and a deformation section between the first side 220 and the second side 230;

[0041] The widest part of the first side 220 intersects with the narrowest part of the second side 230 on the same projection plane;

[0042] The narrowest part of the first side 220 intersects with the widest part of the second side 230 on the same projection plane;

[0043] The size relationship of the first side 220 and the second side 230 satisfies: the widest part of the first side 220 > the narrowest part of the second side 230 and / or the narrowest part of the first side 220 < the widest part of the second side 230.

[0044] In the embodiment, the deformation zone 210 in the hollow metal piece 100 can be continuously arranged in multiple numbers, so that the anti-pulling-off performance is further improved through the combined action of the multiple deformation zones 210, thereby meeting the use requirements of the spoke assembly under different conditions.

[0045] In the embodiment, the deformation zone 210 can be arranged by pre-processing the hollow metal piece 100 or by pressure bonding through a pressure bonding die during preparation. The design of the die can be designed according to the existing die design requirements.

[0046] ​In the embodiment, the widest part and the narrowest part of the first side 220 in the deformation area 210 can be the same, i.e. circular; the widest part and the narrowest part of the second side 230 can be the same, i.e. circular, but the widest part and the narrowest part of the first side 220 and the second side 230 cannot be the same at the same time.

[0047] wherein the narrowest part and the widest part of the first side 220 are the same, the widest part of the first side 220 < the widest part of the second side 230; the narrowest part of the first side 220 > the narrowest part of the second side 230.

[0048] wherein the cross-sectional shape of the first side 220 comprises a circle or a polygon.

[0049] wherein the cross-sectional shape of the second side 230 comprises a circle or a polygon.

[0050] Exemplarily, the polygon comprises a triangle, a square, a rectangle, a pentagon, a hexagon, a heptagon, etc.

[0051] Exemplarily, as the first side 220 is a circle and the second side 230 is an ellipse, the long axis of the ellipse is greater than the diameter of the circle and the short axis of the ellipse < the diameter of the circle; after the spoke 200 is installed, the first side 220 is located at the side far away from the center of the wheel and the second side 230 is located at the side close to the center of the wheel.

[0052] wherein the spoke 200 comprises a carbon fiber spoke or a metal spoke, and is further preferably a carbon fiber spoke.

[0053] In the utility model, the spoke 200 can select the spoke of different materials according to the actual situation or mix the spokes of multiple materials.

[0054] wherein the hollow metal piece 100 and the spoke 200 are integrally formed.

[0055] wherein the hollow metal piece 100 and the spoke 200 are tightly connected.

[0056] wherein the length of the deformation area 210 < the length of the spoke 200 in the hollow metal piece 100, for example, can be 0.1 times, 0.2 times, 0.3 times, 0.35 times, 0.4 times, 0.45 times, 0.5 times, 0.55 times, 0.6 times, 0.65 times, 0.7 times, 0.75 times, 0.8 times, 0.85 times, 0.9 times, 0.95 times or 1 times, etc., but is not limited to the listed values, and other unlisted values in the range also meet the requirements.

[0057] Further, the embodiment provides a preparation method of the foregoing spoke assembly, as shown in the figure, the preparation method comprises: Figure 2 as shown in the figure, the preparation method comprises:

[0058] The hollow metal piece 100 is assembled with the spoke 200, and then the spoke assembly is obtained by crimping the deformation area 210 and forming.

[0059] The forming manner includes hot pressing or hot isostatic pressing.

[0060] In the utility model, the forming manner is reasonably selected according to the composition of the spoke assembly, for example, when the carbon fiber material is used, the hot pressing is preferably used because the curing of the resin material is involved in the process.

[0061] Further, the spoke assembly is suitable for the carbon fiber spoke prepared by the carbon fiber of any specification, which is not further limited, and can be reasonably selected and designed according to actual needs under the premise of meeting the limitation of the utility model.

[0062] Further, the embodiment provides a wheel, which comprises the spoke assembly.

[0063] Further, the embodiment provides a bicycle, which comprises the spoke assembly.

[0064] Further, in order to illustrate the good use effect of the spoke assembly provided by the utility model, the following actual examples are used for illustration, and the specific embodiments are as follows.

[0065] Embodiment 1

[0066] The embodiment provides a spoke assembly, as shown in the drawing, which comprises: Figure 3 The spoke assembly comprises:

[0067] A hollow metal piece 100 and a spoke 200 connected with the hollow metal piece 100.

[0068] The hollow metal piece 100 is provided with one deformation area 210.

[0069] The deformation area 210 comprises a first side surface 220 and a second side surface 230 in the axial direction of the spoke 200 and a deformation section between the first side surface 220 and the second side surface 230; after the spoke 200 is installed, the first side surface 220 is located on the side far away from the center of the wheel, and the second side surface 230 is located on the side close to the center of the wheel.

[0070] The widest part of the first side surface 220 intersects with the narrowest part of the second side surface 230 on the same projection plane; the narrowest part of the first side surface 220 intersects with the widest part of the second side surface 230 on the same projection plane; at this time, the shape of the first side surface 220 is a circle, and the shape of the second side surface 230 is an ellipse, the long axis of the ellipse > the diameter of the circle, and the short axis of the ellipse < the diameter of the circle, the diameter of the circle is 2.2 mm, the long axis of the ellipse is 3.1 mm, and the short axis is 1.3 mm, the first side surface 220 is as shown in Figure 4 , and the second side surface 230 is as shown in Figure 5 .

[0071] The spoke 200 is a carbon fiber spoke; the length of the deformation zone 210 is 0.3 times the length of the spoke 200 in the hollow metal piece 100.

[0072] The preparation process is as follows:

[0073] The hollow metal piece 100 is assembled with the spoke 200, and then the deformation zone 210 is crimped and formed to obtain the spoke assembly.

[0074] Embodiment 2

[0075] The embodiment provides a spoke assembly, which comprises:

[0076] A hollow metal piece 100 and a spoke 200 connected to the hollow metal piece 100;

[0077] The hollow metal piece 100 is provided with two continuous deformation zones 210;

[0078] The deformation zone 210 comprises a first side surface 220 and a second side surface 230 in the axial direction of the spoke 200, and a deformation section between the first side surface 220 and the second side surface 230; after the spoke 200 is installed, the first side surface 220 is located on the side away from the center of the wheel, and the second side surface 230 is located on the side close to the center of the wheel;

[0079] The widest part of the first side surface 220 intersects perpendicularly with the narrowest part of the second side surface 230 on the same projection plane; the narrowest part of the first side surface 220 intersects perpendicularly with the widest part of the second side surface 230 on the same projection plane; at this time, the shape of the first side surface 220 is an ellipse, and the shape of the second side surface 230 is an ellipse, the long axis of the ellipse is 3.1 mm, and the short axis is 1.3 mm;

[0080] The spoke 200 is a carbon fiber spoke; the length of the deformation zone 210 is 0.5 times the length of the spoke 200 in the hollow metal piece 100.

[0081] The preparation process is as follows:

[0082] The hollow metal piece 100 is assembled with the spoke 200, and then the spoke assembly is obtained through the crimping deformation area 210 and molding.

[0083] Embodiment 3

[0084] The embodiment provides a spoke assembly, which comprises:

[0085] a hollow metal piece 100, and a spoke 200 connected with the hollow metal piece 100;

[0086] The hollow metal piece 100 is provided with one deformation area 210;

[0087] The deformation area 210 comprises a first side surface 220 and a second side surface 230 in the axial direction of the spoke 200, and a deformation section between the first side surface 220 and the second side surface 230; the first side surface 220 is located on the side far away from the center of the wheel after the spoke 200 is installed, and the second side surface 230 is located on the side close to the center of the wheel;

[0088] The widest part of the first side surface 220 intersects with the narrowest part of the second side surface 230 on the same projection plane; the narrowest part of the first side surface 220 intersects with the widest part of the second side surface 230 on the same projection plane; at this time, the shape of the first side surface 220 is circular, and the shape of the second side surface 230 is elliptical, the major axis of the ellipse is greater than the diameter of the circle, the minor axis of the ellipse is less than the diameter of the circle, the diameter of the circle is 3.2 mm, the major axis of the ellipse is 4.5 mm, and the minor axis is 2.5 mm;

[0089] The spoke 200 is a carbon fiber spoke; the length of the deformation area 210 is 1 times the length of the spoke 200 in the hollow metal piece 100; and the inner wall of the hollow metal piece 100 is provided with a recess.

[0090] The preparation process is as follows:

[0091] The hollow metal piece 100 is assembled with the spoke 200, and then the spoke assembly is obtained through the crimping deformation area 210 and molding.

[0092] Embodiment 4

[0093] The embodiment provides a spoke assembly, which comprises:

[0094] a hollow metal piece 100, and a spoke 200 connected with the hollow metal piece 100;

[0095] The hollow metal piece 100 is provided with three continuous deformation areas 210;

[0096] The deformation area 210 comprises a first side 220 and a second side 230 along the axial direction of the spoke 200, and a deformation section between the first side 220 and the second side 230; the first side 220 is located on the side away from the center of the wheel after the spoke 200 is installed, and the second side 230 is located on the side close to the center of the wheel.

[0097] The widest part of the first side 220 intersects with the narrowest part of the second side 230 on the same projection plane; the narrowest part of the first side 220 intersects with the widest part of the second side 230 on the same projection plane; at this time, the shape of the first side 220 is a square, and the shape of the second side 230 is an ellipse, the side length of the square is 1.3 mm, the long axis of the ellipse is 3.1 mm, and the short axis is 1.3 mm.

[0098] The spoke 200 is a carbon fiber spoke; the length of the deformation area 210 is 0.3 times the length of the spoke 200 in the hollow metal piece 100; and the inner wall of the hollow metal piece 100 is provided with a protrusion.

[0099] The preparation process is as follows:

[0100] The hollow metal piece 100 and the spoke 200 are assembled, and then the deformation area 210 is deformed by pressure connection and forming to obtain the spoke assembly.

[0101] Example 5

[0102] The difference from example 1 is that the deformation area 210 is continuously provided with three.

[0103] Comparative example 1

[0104] The difference from example 1 is that the deformation area 210 is replaced by an inverted cone with the same length, that is, after the spoke assembly is installed on the wheel, the tip of the cone is directed to the center of the wheel.

[0105] The spoke assemblies obtained in the above examples and comparative examples are subjected to tensile performance detection by using a universal testing machine to apply tension, and then the tensile limit of comparative example 1 is taken as a benchmark, the tensile limit improvement rate of each example relative to comparative example 1 is calculated = the tensile limit of the example / the tensile limit of comparative example 1*100%, and the results are shown in the following table 1.

[0106] Table 1

[0107] Pull-off limit improvement ratio Example 1 320.00％ Example 2 345.71％ Example 3 337.14％ Example 4 388.57％ Example 5 354.29％

[0108] As shown in table 1, the spoke assembly provided by the utility model enhances the tensile effect between the spoke and the hollow metal piece by designing a specific deformation area and the interference between the first side and the second side, so as to improve the tensile effect of the spoke assembly.

[0109] The preferred embodiments of the present application are described in detail above, but the present application is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0110] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not further describe various possible combinations.

[0111] In addition, various different embodiments of the present application can also be combined in any manner, as long as they do not deviate from the concept of the present application, and they should also be considered as disclosed by the present application.

Claims

1. A spoke assembly, characterized by, The spoke assembly comprises: a hollow metal piece, a spoke connected to the hollow metal piece, at least one deformation zone is arranged in the hollow metal piece, the deformation zone comprises a first side and a second side along the axial direction of the spoke, and a deformation section between the first side and the second side, the widest part of the first side intersects with the narrowest part of the second side in the same projection plane, the narrowest part of the first side intersects with the widest part of the second side in the same projection plane, 2. The spoke assembly of claim 1, wherein, the size relationship of the first side and the second side satisfies: the widest part of the first side > the narrowest part of the second side, and / or, the narrowest part of the first side < the widest part of the second side.

3. The spoke assembly of claim 2, wherein, the narrowest part and the widest part of the first side are the same, the widest part of the first side < the widest part of the second side, and the narrowest part of the first side > the narrowest part of the second side.

4. The spoke assembly of claim 2, wherein, the cross-sectional shape of the first side comprises a circle or a polygon.

5. The spoke assembly of claim 1, wherein, the cross-sectional shape of the second side comprises a circle or a polygon. the first side is a circle, and the second side is an ellipse, the long axis of the ellipse in the second side > the diameter of the circle in the first side, 6. The spoke assembly of claim 1, wherein, the short axis of the ellipse in the second side < the diameter of the circle in the first side.

7. The spoke assembly of claim 1, wherein, the hollow metal piece is tightly connected to the spoke.

8. The spoke assembly of claim 1, wherein, the length of the deformation zone < the length of the spoke in the hollow metal piece.

9. A vehicle wheel, characterised in that the inner wall of the hollow metal piece is provided with recesses and / or protrusions.

10. A bicycle characterized in that, the wheel comprises the spoke assembly according to any one of claims 1-8. the bicycle comprises the spoke assembly according to any one of claims 1-8.

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