Connecting structure of spoke body and metal piece and carbon fiber spoke

Abstract

The utility model provides a connecting structure of a spoke body and a metal piece and a carbon fiber spoke, the connecting structure is characterized in that the end part of the spoke body is provided with a special-shaped section, the special-shaped section comprises a plurality of columnar parts with different section diameters, and the connecting structure comprises the metal piece and a fastener; the end through hole is defined by at least two metal parts, and the metal parts are obtained by cutting a metal piece; the fastener is a carbon fiber ring and is used for locking and fixing the metal piece assembled by the at least two metal parts on the special-shaped section. The problems that the connection strength between the spoke body and the rim and the hub is insufficient, the weight is large, and the precision of a fixed connector is insufficient are solved. By means of the arrangement of the end through holes and the fasteners, rapid assembly of the spoke body and the metal piece is achieved, the connection strength is high, the durability and the overall light weight of a product are further improved, and the spoke has wide application prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle wheels, and in particular to a connection structure of a spoke body and a metal piece, and a carbon fiber spoke. Background Art

[0002] One end of the carbon fiber spoke of the existing bicycle wheel is fixed to the hub by connecting a metal piece, and the other end is fixed to the wheel rim by connecting a metal piece.

[0003] In the existing technical solutions, such as the patent with patent announcement number CN207028695U, a carbon fiber spoke is disclosed, in which a fixing joint is fixed at both ends of the spoke body, a first tapered section is set on the outer peripheral surface of the fixing joint, a mounting hole is set on the cap and the cap head, and the wall of the mounting hole has a second tapered section, and the first tapered section and the second tapered section are adapted together. In this method, a fixing joint is formed at both ends of the spoke body, and the fixing joint is formed by wrapping yarn at both ends of the spoke body and curing, resulting in insufficient length dimensional accuracy of the carbon fiber spoke.

[0004] Another example is the patent with patent announcement number CN205273028U, which discloses a carbon fiber spoke, including a spoke body, one end of which is connected to a first accessory that can be connected to a rim, and the other end of which is connected to a second accessory that can be connected to a hub. The connection between the end of the spoke body and the accessory is only made by bonding. During use, the hub and the rim can generate tension on the accessory, which makes the accessory easily pulled away from the spoke body, resulting in separation of the two, a short service life, and insufficient connection strength. Utility Model Content

[0005] In order to solve the problems of insufficient connection strength between the spoke body and the rim and hub, heavy weight, and insufficient precision of the fixing joint, the present application provides a connection structure between the spoke body and a metal part, and a carbon fiber spoke.

[0006] In the first aspect, the utility model proposes a connection structure between a spoke body and a metal part, wherein a special-shaped section is provided at the end of the spoke body, and the special-shaped section includes a plurality of columnar parts with different cross-sectional diameters, and the connection structure includes a metal part and a fastener: an end through hole matching the special-shaped section is provided in the metal part, and the end through hole is surrounded by at least two metal parts, and the metal parts are obtained by cutting the metal part; the fastener is a carbon fiber ring, which is used to lock and fix the metal part assembled by at least two metal parts on the special-shaped section.

[0007] Furthermore, the end through holes include cylindrical through holes and frustum through holes that penetrate each other, the cylindrical through holes and frustum through holes are distributed at intervals, and a step surface is provided at the connection between the cylindrical through holes and the frustum through holes.

[0008] Furthermore, the cylindrical through hole includes a first cylindrical through hole, a second cylindrical through hole and a third cylindrical through hole with different cross-sectional diameters, the cross-sectional diameters of the first cylindrical through hole and the third cylindrical through hole are larger than the cross-sectional diameter of the second cylindrical through hole, and the cross-sectional diameter of the third cylindrical through hole is larger than the cross-sectional diameter of the first cylindrical through hole.

[0009] Furthermore, the frustum through hole includes a first frustum through hole and a second frustum through hole, the first frustum through hole forms a first step surface and a second step surface with the first cylindrical through hole and the second cylindrical through hole respectively, and the second frustum through hole forms a third step surface with the third cylindrical surface.

[0010] Furthermore, the first frustum-cone through hole and / or the second frustum-cone through hole are / is expanded from the first cylindrical through hole along the direction of the third cylindrical through hole.

[0011] Furthermore, the spoke body includes a special-shaped section, a transition section and a flat section. The special-shaped section includes an arc portion, a truncated cone portion and a transition portion adapted to the cylindrical through hole, the truncated cone through hole and the step surface. The truncated cone portion is in a flared shape on the side away from the flat section.

[0012] In the second aspect, the utility model proposes a carbon fiber spoke, comprising the above-mentioned connecting structure and a spoke body, a first special-shaped segment is provided at one end of the spoke body, the connecting structure comprises a first metal part and a first fastener and a second fastener locked and fixed at both ends of the first special-shaped segment, the first metal part is cut into at least two first metal parts, the first fastener and the second fastener are used to lock and fix the first metal part assembled with at least two first metal parts on the first special-shaped segment.

[0013] Furthermore, a second special-shaped segment is provided at the other end of the spoke body, and the connecting structure also includes a second metal piece and a third fastener locked and fixed to the second special-shaped segment, the second metal piece is cut into at least two second metal parts, and the third fastener is used to lock and fix the second metal piece assembled by at least two second metal parts on the second special-shaped segment.

[0014] Furthermore, a threaded hole is provided on the outer peripheral surface of the first metal part, and a glue layer is provided on the contact surface between the first metal part and the first special-shaped segment. The first fastener and the second fastener are used to lock and fix the first metal part assembled and aligned with the threaded hole on the first special-shaped segment.

[0015] Furthermore, the second metal part is a "T"-shaped structure, a glue layer is provided on the contact surface between the second metal part and the second special-shaped section, and the third fastener is used to lock and fix the at least two second metal parts that are assembled and aligned on the second special-shaped section.

[0016] Compared with the prior art, the beneficial results of the utility model are:

[0017] 1. Cut the metal parts, and through the end through holes and fasteners, the spoke body and the metal parts can be quickly assembled, and the connection strength is high, which further improves the durability and overall lightweight of the product.

[0018] 2. Use fasteners that can be mass-produced to fix the metal parts to the special-shaped section at the end of the spoke body, which improves the dimensional accuracy of carbon fiber spokes of different lengths compared to yarn curing.

[0019] 3. The metal parts are screwed to the nuts in the wheel rim through threaded holes to achieve mating connection, or are hooked to the hub through a "T"-shaped cap head structure. The force applied by the wheel rim or the hub on the metal parts is a tensile force. This tensile force causes the first frustum portion and the third arc portion to have opposite forces compared to the first step surface and the third step surface, respectively. This force can further improve the fastening performance between the nuts or hubs in the wheel rim and the metal parts, utilize their excellent mechanical properties to avoid separation, and improve the performance and durability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and are used together with the description to explain the principles of the utility model. It will be easy to recognize many expected advantages of other embodiments and embodiments because they become better understood by reference to the following detailed description. The elements of the accompanying drawings are not necessarily in proportion to each other. The same reference numerals refer to corresponding similar parts.

[0021] Figure 1 is a schematic diagram of a connection structure according to an embodiment of the utility model;

[0022] Figure 2 This is a front view of a connection structure according to an embodiment of the utility model;

[0023] Figure 3 AA is a cross-sectional schematic diagram according to an embodiment of the utility model;

[0024] Figure 4 is a schematic structural diagram of a first metal part according to an embodiment of the utility model;

[0025] Figure 5 is a front view of a spoke body according to an embodiment of the utility model;

[0026] Figure 6 is a structural diagram of one end of a spoke body according to an embodiment of the utility model;

[0027] Figure 7 is a cross-sectional view of a carbon fiber spoke according to an embodiment of the utility model;

[0028] Figure 8 It is a schematic diagram of threaded hole calibration during the preparation of a carbon fiber spoke according to an embodiment of the utility model.

[0029] The meaning of the numbers in the figure: 100-spoke body, 200-first metal part, 300-nut, 400-first fastener, 500-second fastener, 600-third fastener, 700-second metal part, 201-first metal part, 203-end through hole, 204-threaded hole, 205-nut part, 2031-first cylindrical through hole, 2032-second cylindrical through hole, 2033-third cylindrical through hole, 2034-first frustum through hole, 2035-second frustum through hole , 2036-first step surface, 2037-second step surface, 2038-third step surface, 101-first special-shaped section, 102-transition section, 103-flat section, 104-second special-shaped section, 1011-first arc portion, 1012-second arc portion, 1013-third arc portion, 1014-first frustum portion, 1015-second frustum portion, 1016-first transition portion, 1017-second transition portion, 1018-third transition portion, 701-"T" type cap head structure. DETAILED DESCRIPTION

[0030] In the following detailed description, reference is made to the accompanying drawings, which form a part of the detailed description and are shown by illustrative specific embodiments in which the present invention can be practiced. To this end, directional terms, such as "top", "bottom", "left", "right", "up", "down", etc., are used with reference to the orientation of the figures described. Because the components of the embodiments can be positioned in several different orientations, directional terms are used for the purpose of illustration and are by no means limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present invention. Therefore, the following detailed description should not be adopted in a limiting sense, and the scope of the present invention is defined by the appended claims.

[0031] The utility model proposes a connection structure between a spoke body and a metal part, referring to Figure 1-2 , Figure 1-2The schematic diagram and the main view of the connection structure of an embodiment of the utility model are respectively shown. As shown in the figure, the connection structure includes a first metal member 200, a first fastener 400 and a second fastener 500. The first metal member 200 is provided with an end through hole 203 for covering the spoke body 100. The end through hole 203 is surrounded by at least two first metal parts 201. The first fastener 400 and the second fastener 500 are respectively sleeved on both ends of the first metal member 200; the outer peripheral surface of at least two first metal parts 201 is provided with a threaded hole 204 and a nut part 205. The first fastener 400 and the second fastener 500 are used to fix and lock the first metal member 200 assembled and aligned with the threaded hole 204 on the spoke body 100.

[0032] In some specific embodiments, the end through hole 203 is formed by enclosing two first metal parts 201, and the two first metal parts 201 are formed by cutting the same first metal member 200 in half. Preferably, the two first metal parts 201 are formed by cutting the same first metal member 200 in half, and conceivably, the first metal part 201 can be formed by cutting the first metal member 200 in non-equal parts, or the first metal part 201 can be cut by cutting the first metal member 200 in equal parts several times, that is, forming at least two first metal parts, and the first metal member 200 is one or more of an aluminum alloy and a titanium alloy.

[0033] In some specific embodiments, the first fastener 400 and / or the second fastener 500 are made of carbon fiber material, and specifically, the first fastener 400 and / or the second fastener 500 are carbon fiber ring structures, which are used to assemble and lock each first metal part 201 to the spoke body 100. Further, the first fastener 400 is a short carbon fiber ring that is tightly sleeved near the nut part 205, and the second fastener 500 is a long carbon fiber ring that is sleeved near the threaded hole 204.

[0034] In some specific embodiments, reference Figure 3 and Figure 4 , Figure 3 for Figure 2 The AA section view of the main view of the connecting structure, Figure 4A schematic structural diagram of the first metal part of an embodiment of the utility model is shown. As shown in the figure, the end through hole 203 includes a first cylindrical through hole 2031, a first conical through hole 2034, a second cylindrical through hole 2032, a second conical through hole 2035 and a third cylindrical through hole 2033 that are interconnected, wherein the cylindrical through holes and the conical through holes are arranged at intervals, and a step surface is provided at the connection between the cylindrical through holes and the conical through holes. Specifically, the first conical through hole 2034 forms a first step surface 2036 and a second step surface 2037 with the first cylindrical through hole 2031 and the second cylindrical through hole 2032, respectively, and a third step surface 2038 is provided between the second conical through hole 2035 and the third cylindrical through hole 2033. The cross-sectional diameters of the first cylindrical through hole 2031, the second cylindrical through hole 2032, and the third cylindrical through hole 2033 are d1, d2, and d3, and the cross-sectional diameters thereof are d3>d1>d2, and the first frustum through hole 2034 and / or the second frustum through hole 2035 are expanded from the first cylindrical through hole 2031 along the direction of the third cylindrical through hole 2033. By utilizing the interval distribution of the cylindrical through holes and the frustum through holes and the design of cross-sectional diameters of different sizes, the connection structure has excellent mechanical properties and long-term durability.

[0035] In some specific embodiments, reference Figure 5-6 , Figure 5 and Figure 6 The front view of the spoke body and the structural diagram of one end of the spoke body of an embodiment of the utility model are respectively shown. As shown in the figure, the spoke body 100 is made of carbon fiber material, and includes a transition section 102 and a flat section 103 and a first special-shaped section 101 and a second special-shaped section 104 provided at the end, the first special-shaped section 101 and the second special-shaped section 104 include a plurality of columnar sections with different cross-sectional diameters, the special-shaped section 101 of the spoke body 100 is adapted to the special-shaped channel 203 provided in the first metal part 200, and the special-shaped section 101 includes a first arc section 1011, a first transition section 1016, a first truncated cone section 1014, a second transition section 1017, a second arc section 1012, a second truncated cone section 1015, a third transition section 1018 and a third arc section 1013 connected to each other at the end. The cross-sectional diameters of the first arc portion 1011 and the third arc portion 1103 are larger than the cross-sectional diameter of the second arc portion 1012, and the cross-sectional diameter of the third arc portion 1013 is larger than the cross-sectional diameter of the first arc portion 1101. The first frustum portion 1014 and / or the second frustum portion 1015 are flared in the direction of the third arc portion 1103 from the first arc portion 1011, that is, the frustum portion is flared on the side away from the flat section 103.

[0036] The utility model also proposes a carbon fiber spoke, combined with reference Figure 5-7 , Figure 7A cross-sectional view of a carbon fiber spoke of an embodiment of the utility model is shown. As shown in the figure, the first special-shaped segment 101 and / or the second special-shaped segment 104 at both ends of the spoke body 100 are respectively adapted to the shape of the end through hole 203. The three cylindrical through holes, two frustum through holes and three step surfaces formed by the first metal part 201 mutually enclosed each other correspond to the three arc parts, two frustum parts and three transition parts of the first special-shaped segment 101 respectively. By setting the size and distribution position of the cylindrical through hole / arc part, setting the expansion direction of the frustum through hole / frustum part, and designing the step surface and transition part, as well as coating the intermediate rubber layer between the first metal part 201 and the first special-shaped segment 101, the effect of locking the spoke body in the connection structure is achieved. In actual use, the threaded hole 204 on the connection structure is threadedly connected with the nut in the wheel rim to achieve a mating connection. The force exerted by the wheel rim on the first metal member 200 is a tensile force, which makes the first truncated cone portion 1014 and the third arc portion 1013 have opposite forces compared to the first step surface 2036 and the third step surface 2038, respectively. This force improves the fastening performance between the nut in the wheel rim and the connection structure to avoid separation. In addition, the design of the cross-sectional diameter size and distribution of the cylindrical through hole / arc portion is cleverly used to further enhance the fastening performance between the nut in the wheel rim and the connection structure.

[0037] In some specific embodiments, the connection structure further includes a third fastener 600 and a second metal member 700 of a "T"-shaped structure. The third fastener 600 is used to lock and fix the assembled and aligned second metal part to the second special-shaped segment 104 of the spoke body 100. The second special-shaped segment 104 has the same mirror-image special-shaped structure as the first special-shaped segment 101. Specifically, the second metal member 700 is provided with the above-mentioned end through hole, and one end is a "T"-shaped cap head structure 701. The end through hole is adapted to the second special-shaped segment 104, and a rubber layer is provided on the contact surface between the second metal part and the second special-shaped segment 104. In actual use, the "T"-shaped cap head structure 701 is connected by hooking with the hub. The force exerted by the hub on the second metal member 700 is a tensile force. The tensile force also makes the first truncated cone portion and the third arc portion of the second special-shaped segment have opposite forces compared with the first step surface and the third step surface, respectively. The force improves the fastening performance between the hub and the second metal member 700 to avoid separation. In addition, the cross-sectional diameter size and distribution arrangement of the cylindrical through hole / arc portion are cleverly utilized to further enhance the fastening performance between the hub and the second metal component 700.

[0038] In some specific embodiments, the second metal member 700 is cut into two second metal parts, the third fastener 600 is fixed to the second special-shaped segment 104 of the spoke body 100, the second metal part away from one end of the "T"-shaped cap head structure 701 is inserted into the third fastener 600, and after being locked and fixed, one end of the "T"-shaped cap head structure 701 is hooked and connected to the hub.

[0039] In some specific embodiments, the first fastener is sleeved on the first arc portion of the first special-shaped segment, and the first metal part is inserted into the first fastener at one end close to the nut portion. At least two first metal parts enclose an end through hole that matches the first special-shaped segment, and a glue layer is provided in the end through hole and the first special-shaped segment. The second fastener is sleeved on the other end of the first metal part, and the threaded hole is adjusted by screwing the nut, and then locked and cured to obtain the carbon fiber spoke. Figure 8 , Figure 8 FIG. 1 shows a schematic diagram of threaded hole calibration during the preparation of a carbon fiber spoke according to an embodiment of the present invention. Figure 8 As shown, the nut 300 is screwed in and aligned with the threaded hole, and after being locked and cured, the nut is screwed out to obtain the carbon fiber spoke.

[0040] In some specific embodiments, the adhesive layer is a low-temperature high-strength epoxy resin or other adhesive suitable for bonding carbon fiber to metal, and the adhesive is evenly coated on the contact surface between the special-shaped segment and the metal part. The first fastener is sleeved on the first arc portion of the special-shaped segment, and the metal part coated with the adhesive is covered on the special-shaped segment of the carbon fiber spoke coated with the adhesive, and the close contact and alignment operation is completed by a slow-drying gluing process. The second fastener is sleeved on the other end of the metal part and tied tightly, and the threaded hole is calibrated and aligned with the nut, thereby achieving the calibration, locking and fixing effect of the metal part.

[0041] Obviously, those skilled in the art can make various modifications and changes to the embodiments of the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and changes are within the scope of the claims of the present invention and their equivalents, the present invention is also intended to cover these modifications and changes. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are recorded in mutually different dependent claims does not indicate that the combination of these measures cannot be used to profit. Any figure mark in the claims should not be considered to limit the scope.

Claims

1. A connection structure between a spoke body and a metal part, characterized in that: The end of the spoke body is provided with a special-shaped section, and the special-shaped section includes a plurality of columnar parts with different cross-sectional diameters, and the connecting structure includes a metal part and a fastener: The metal piece is provided with an end through hole matched with the special-shaped section, and the end through hole is surrounded by at least two metal parts, and the metal parts are obtained by cutting the metal piece; The fastener is a carbon fiber ring, which is used to lock and fix the metal parts assembled by at least two metal parts on the special-shaped segment.

2. The connection structure of the spoke body and the metal member according to claim 1, characterized in that: The end through hole comprises a cylindrical through hole and a frustum through hole which penetrate each other, the cylindrical through hole and the frustum through hole are arranged at intervals, and a step surface is provided at the connection between the cylindrical through hole and the frustum through hole.

3. The connection structure between the spoke body and the metal member according to claim 2, characterized in that: The cylindrical through hole includes a first cylindrical through hole, a second cylindrical through hole and a third cylindrical through hole with different cross-sectional diameters. The cross-sectional diameters of the first cylindrical through hole and the third cylindrical through hole are larger than the cross-sectional diameter of the second cylindrical through hole, and the cross-sectional diameter of the third cylindrical through hole is larger than the cross-sectional diameter of the first cylindrical through hole.

4. The connection structure of the spoke body and the metal member according to claim 3, characterized in that: The frustum through hole comprises a first frustum through hole and a second frustum through hole, wherein the first frustum through hole forms a first step surface and a second step surface with the first cylindrical through hole and the second cylindrical through hole respectively, and the second frustum through hole forms a third step surface with the third cylindrical surface.

5. The connection structure between the spoke body and the metal member according to claim 4, characterized in that: The first frustum-cone through hole and / or the second frustum-cone through hole are / is expanded from the first cylindrical through hole along the direction of the third cylindrical through hole.

6. The connection structure of the spoke body and the metal member according to claim 2, characterized in that: The spoke body includes the special-shaped section, the transition section and the flat section. The special-shaped section includes an arc portion, a truncated cone portion and a transition portion adapted to the cylindrical through hole, the truncated cone through hole and the step surface. The truncated cone portion is in a flared shape on the side away from the flat section.

7. A carbon fiber spoke, characterized in that: The carbon fiber spoke comprises a connecting structure as described in any one of claims 1 to 6 and a spoke body, wherein a first special-shaped segment is provided at one end of the spoke body, and the connecting structure comprises a first metal member and a first fastener and a second fastener locked and fixed at both ends of the first special-shaped segment, wherein the first metal member is cut into at least two first metal parts, and the first fastener and the second fastener are used to lock and fix the first metal member assembled by at least two of the first metal parts on the first special-shaped segment.

8. The carbon fiber spoke according to claim 7, characterized in that: A second special-shaped segment is also provided at the other end of the spoke body, and the connecting structure also includes a second metal piece and a third fastener locked and fixed to the second special-shaped segment, the second metal piece is cut into at least two second metal parts, and the third fastener is used to lock and fix the second metal piece assembled by at least two second metal parts on the second special-shaped segment.

9. The carbon fiber spoke according to claim 7, characterized in that: A threaded hole is provided on the outer peripheral surface of the first metal part, and a glue layer is provided on the contact surface between the first metal part and the first special-shaped segment. The first fastener and the second fastener are used to lock and fix the first metal part assembled and aligned with the threaded hole to the first special-shaped segment.

10. The carbon fiber spoke according to claim 8, characterized in that: The second metal part is a "T"-shaped structure, and a glue layer is provided on the contact surface between the second metal part and the second special-shaped segment. The third fastener is used to lock and fix at least two assembled and aligned second metal parts on the second special-shaped segment.

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