CN220163561U

CN220163561U - Novel carbon fiber spoke with mortise and tenon structure

Info

Publication number: CN220163561U
Application number: CN202321237700.3U
Authority: CN
Inventors: 邱景生
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-05-22
Filing date: 2023-05-22
Publication date: 2023-12-12
Anticipated expiration: 2033-05-22

Abstract

The novel carbon fiber spoke with the mortise and tenon structure comprises a joint structure and a carbon fiber spoke, wherein the joint structure is used for installing the carbon fiber spoke on a rim/hub, and through holes (reducing holes) penetrating front and back are formed in the joint structure; the connecting end of the carbon fiber spoke is provided with a mortise and tenon structure, and the mortise and tenon structure consists of a gap which is internally arranged at the connecting end and a riveting nail which corresponds to the shape of the gap; the maximum section end of the connecting end of the carbon fiber spoke allows the minimum diameter reducing end of the diameter reducing hole, the connecting end penetrates through the diameter reducing hole of the joint structure from the diameter reducing end of the diameter reducing hole of the joint structure, the riveting nails are riveted in the gaps to open the connecting end from the inside to the outside, tight fit between the outer part of the connecting end and the inner wall of the through hole of the joint structure is ensured, mechanical property and stability of a pure mechanical structure of a mortise and tenon structure are effectively utilized, the carbon fiber spoke is fixed to the joint structure, and effective fixation with a rim/hub is ensured.

Description

Novel carbon fiber spoke with mortise and tenon structure

Technical Field

The utility model relates to the field of carbon fiber spokes, in particular to a novel carbon fiber spoke with a mortise and tenon structure.

Background

In the field of vehicles such as bicycles, motorcycles and wheelchairs, the parts of the wheels are mainly wheel groups formed by hub, rim and spokes, wherein one end of each spoke is connected with the rim, the other end of each spoke is connected with the hub, each spoke has the functions of increasing strength and supporting tires, the stability of the bicycle, the motorcycle or the wheelchair can be ensured by adjusting the tightness of each spoke, and the traditional spoke is mainly made of carbon steel or stainless steel, and has heavy weight, high cost and low production efficiency. At present, some carbon fiber spokes appear on the market, the existing carbon fiber spokes are usually characterized in that a tooth cap and a cap head made of metal materials are respectively nested at two ends of a carbon fiber spoke body, and then are fixed in a gluing mode, so that the tooth cap and the cap head are fixed with the carbon fiber spoke body, and further are fixed with an external structure by utilizing the tooth cap and the cap head, but the design has higher requirements on the gluing technology and the bonding strength of the adhesive, and also has degumming risks, so that the use stability and the safety of the carbon fiber spokes are affected; in addition, when glue is glued, the effect controllability to the bonding is poor, especially in the higher field of precision requirement, how effectively fix when gluing to guarantee gluing's precision, it is the very difficult thing in fact. Therefore, how to fix the carbon fiber spokes with the external structure (such as the rim/hub, etc.), especially how to fix the spokes without glue or adhesive; and how to realize high-precision structural matching, ensuring the convenience of installation in the use process is an important research direction.

In view of the above, the present inventors have made intensive studies to solve the above-mentioned drawbacks of the prior art.

Disclosure of Invention

The utility model aims at a novel carbon fiber spoke with mortise and tenon structure, which enables the carbon fiber spoke to be more firmly arranged on an external structure, such as a rim/hub, through the effective design and matching of a mechanical structure, and enables the precision of the carbon fiber spoke to be controllable when the carbon fiber spoke is fixed with the outside; meanwhile, the edge and the side edges are tightly matched, so that the stabilizing effect during assembly is realized.

In order to achieve the purpose of the patent, the patent discloses a novel carbon fiber spoke with a mortise and tenon structure, which comprises a joint structure and a carbon fiber spoke, wherein the joint structure is used for installing the carbon fiber spoke on an external structure, a front-back penetrating hole is formed in the joint structure, a reducing hole is formed in at least part of the penetrating hole, the reducing hole is in a form of gradually shrinking from front to back, and at least one longitudinal side edge is arranged in the reducing hole; at least one end of the carbon fiber spoke is provided with a connecting end, the connecting end is provided with a mortise and tenon structure, and the mortise and tenon structure consists of a gap which is arranged inwards at the end part of the connecting end and riveting nails which are arranged in the gap and spread the connecting end outwards; the maximum section end of the connecting end of the carbon fiber spoke allows to pass through the minimum diameter reducing end of the diameter reducing hole, at least one edge is arranged on the periphery of the connecting end and corresponds to the side edge of the diameter reducing hole, the connecting end penetrates through the diameter reducing hole of the joint structure from the diameter reducing end of the diameter reducing hole of the joint structure, the riveting nail is riveted in the gap to prop the connecting end from the inside to the outside, tight fit between the outer part of the connecting end and the inner wall of the through hole of the joint structure is ensured, and especially, the edge on the periphery of the connecting end is tightly matched with the side edge of the diameter reducing hole.

Further, the connecting ends of the carbon fiber spokes are regular cylinders with equal cross sections before being provided with gaps.

Further, the connecting end of the carbon fiber spoke is a right cylinder with a square, rectangular, trapezoid or triangle cross section before being provided with a gap.

Further, the connecting end is provided with a gap, and the length of the gap accounts for 60-80% of that of the connecting end.

Further, the rivet has a shape corresponding to the shape of the slit.

Further, the guiding cone angle alpha epsilon (1 DEG, 3.5 DEG) of any longitudinal guiding edge of the diameter-reduced hole.

Further, the inward gaps of the connecting ends divide the connecting ends of the carbon fiber spokes into at least two parts, and the gaps are arranged in a longitudinal direction and in a straight inward direction from the middle of the connecting end parts of the carbon fiber spokes; the rivet exhibits a thin-to-thick one-piece construction, matching the slit shape.

Further, the gap is a cross-shaped gap, the connecting end is bifurcated into four parts, and the riveting nail is of a cross-shaped structure from thin to thick and is matched with the cross-shaped gap in shape.

Further, an external thread is arranged at the outer part of the front end of the joint structure and is used for being screwed on a fixing structure corresponding to the rim/the hub.

By adopting the structure, the mechanical property and stability of the pure mechanical structure of the mortise and tenon structure are effectively utilized, the connecting ends of the carbon fiber spokes are unfolded by utilizing the riveting nails in the gaps, the external shape of the connecting ends is consistent with the shape of the reducing holes of the joint structure, and the connecting ends of the carbon fiber spokes can be tightly fixed on the inner walls of the reducing holes in the joint structure only by pulling the joint structure forwards (outwards), so that the connecting ends can be tightly matched with the penetrating holes of the joint structure, and meanwhile, a certain torsion force can be generated in the process of braiding, and the damage of locking torsion force brought by the locking of the spokes on the spokes and metal links can be effectively reduced by adopting the structure of tightly matched edges and side edges in the process of braiding the spokes; the cooperation effect of the connecting end of the carbon fiber spoke and the connecting structure is effectively guaranteed through a physical (mechanical) structure, and then the connecting structure is fixed with the fixing structure on the rim/hub. When the carbon fiber spoke is used, if the tensile force is applied, the carbon fiber spoke and the shrinkage cavity are pulled more tightly, so that the tensile strength is greatly improved.

This patent can utilize the design to riveting structure, and the shape of riveting nail in the rational design gap for the degree of control carbon fiber spoke and metalwork's connection, the precision of this connection promptly becomes controllable, only needs to accomplish the structural fit of high accuracy through the gap of control riveting structure and the shape of riveting nail.

Secondly, the production technology of this patent's process is simple, and production energy efficiency is high, and assembly process is also simpler, and need not to wait for glue and resolidify, and the efficiency that the finished product was made is also higher, the precision is also higher, is particularly useful for extensively promoting.

The novel wheel-mounted frame structure can be used in the field of vehicles such as bicycles, motorcycles, wheelchairs and the like, even in the field of bridge and road construction, when the novel wheel-mounted frame structure is of a spoke structure or a beam with improved strength, the novel wheel-mounted frame structure can also be used.

Drawings

The detailed description given as non-limiting examples better explain what the utility model comprises and can be implemented with reference to the accompanying drawings, in which:

FIGS. 1-3 are schematic illustrations of the connection structure of the present utility model;

FIGS. 4-5 are schematic illustrations of the connecting ends of carbon fiber spokes according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a rivet according to an embodiment of the present utility model;

FIG. 7 is an assembled schematic view of an embodiment of the present utility model;

FIG. 8 is a schematic cross-sectional view of an assembled embodiment of the present utility model.

Description of the embodiments

The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

Examples

Referring to fig. 1 to 8, a novel carbon fiber spoke 2 includes a joint structure 1 and a carbon fiber spoke 2, the joint structure 1 is used for installing the carbon fiber spoke 2 on an external structure, in this embodiment, the external structure is a rim/hub, a through hole penetrating from front to back is provided in the joint structure 1, in this embodiment, the through hole forms a reducing hole 11, the reducing hole 11 takes a form of gradually shrinking from front to back, in this embodiment, the reducing end 11a of the reducing hole 11 has a square cross section, and gradually expands to the expanding end 11b to have a rectangular cross section, wherein the width of the rectangular cross section of the expanding end 11b is consistent with the square side length of the cross section of the reducing end 11 a.

The outer part of the front end of the joint structure 1 is provided with an external thread 12 which is used for being screwed on a corresponding fixing structure of the rim/hub; at least one end of the carbon fiber spoke 2 is set as a connecting end 21, the connecting end 21 is provided with a mortise and tenon structure 20a, the mortise and tenon structure 20a is composed of a gap 22a arranged inwards of the connecting end 21 and a riveting nail 3a corresponding to the shape of the gap 22a, in this embodiment, the connecting end 21 of the carbon fiber spoke 2 is a square cylinder with a square cross section before the gap 22a is arranged, is adapted to the cross section of the diameter reducing end 11a of the diameter reducing hole 11, and then the gap 22a is arranged inwards from the end of the connecting end 21, and the inwardly arranged gap 22a bifurcates the connecting end 21 of the carbon fiber spoke 2 into two parts; the square column is provided with four edges 211 which are beneficial to tightly matching with the four side edges 111 of the shrinkage cavity 11, so that the unnecessary rotation effect can be effectively reduced when the carbon fiber spokes are assembled, and the assembly stability of the carbon fiber spokes is further ensured; meanwhile, the uniform square column production process is simple and convenient, and high-efficiency low-cost production is facilitated.

The connecting end 21 passes through the reducing hole 11 from the reducing end 11a of the reducing hole 11 of the joint structure 1, and in this embodiment, the slit 22a is split from the middle of the end part of the connecting end 21 of the carbon fiber spoke 2 in a longitudinal direction and directly inwards; whereas the rivet 3a exhibits a thin-to-thick one-piece structure matching the shape of the slit 22 a;

as shown in fig. 7, the thin end of the rivet 3a extends into the gap 22a, so that the rivet 3a is riveted in the gap 22a, so that the connecting end 21 is ensured to be opened outwards (two parts are opened outwards respectively), and the outer end of the connecting end 21 is further enlarged to be rectangular, as shown in fig. 7-8, in this embodiment, the total length of the connecting end 21 of the carbon fiber spoke is larger than that of the joint structure 1, the connecting end penetrates from the diameter reducing end of the diameter reducing hole 11 of the joint structure 1, and after the rivet is riveted in the gap to open the connecting end 21 outwards from the inside, the joint structure can be pulled forwards (outwards) to ensure that the outer part of the connecting end 21 is tightly matched with the inner wall of the through hole (the diameter reducing hole 11) of the joint structure 1, especially, the four edges 211 at the periphery of the connecting end are tightly matched with the four side edges 111 of the diameter reducing hole 11. Therefore, the close fit between the connecting end 21 of the carbon fiber spoke 2 and the connecting structure is effectively ensured through the physical structure, and the carbon fiber spoke is fixed with the fixing structure on the rim/hub through the connecting structure, and is generally fixed on the rim/hub through the screw connection of the connecting structure.

In this embodiment, the length of the gap 22a provided by the connection end 21 accounts for 60-80% of the total length of the connection end 21 of the carbon fiber spoke 2, and such arrangement is beneficial to the connection end 21 being spread with enough length, and the degree of expansion exhibited by the outer wall of the connection end after the connection end is spread is in a reasonable range, so as to achieve more effective matching with the diameter reduction hole 11, i.e. the area of the connection end 21 tightly matched with the diameter reduction hole 11 is large enough, thereby ensuring the connection stability of the carbon fiber spoke 2 and the metal joint structure 1. In this embodiment, the guiding taper angle α∈0 °,3.5 ° of any longitudinal guiding edge of the reducing hole 11 is a more reasonable taper design.

Due to the diameter reduction design of the diameter reduction holes 11, when the carbon fiber spoke is in use, if the tensile force is applied, the carbon fiber spoke 2 and the diameter reduction holes 11 are pulled more tightly, so that the matching is more compact and stable, and the tensile strength and the stability of the carbon fiber spoke during fixing are greatly improved.

In a practical embodiment, the gap can be designed as a cross-shaped gap, and the corresponding riveting nail has a cross-shaped structure from thin to thick; or the structure is designed into a mortise and tenon structure matched with a three-fork type, and the mortise and tenon structure can be specifically adjusted according to actual conditions.

Because the carbon fiber spoke 2 is formed by combining a plurality of carbon fiber filaments, the carbon fiber spoke has excellent high tensile property along the length direction, and the gap designed by the utility model is generated along the length direction of the carbon fiber filaments, does not transversely bear force on the carbon fiber filaments, but adopts the matching mode of a mechanical structure designed by the characteristics of the carbon fiber filaments, so that the carbon fiber spoke has high stress intensity, high stability and long service life. The device can be used in the fields of vehicles such as bicycles, motorcycles, wheelchairs and the like without being limited, and the application range can be further enlarged.

The carbon fiber product is formed by tightly combining a limited number of carbon fibers, and the carbon fiber product with the same diameter can be formed at one time during manufacturing, if the shape with non-same diameter (non-equal cross section) is required to be manufactured, a secondary forming process is required, and the secondary forming process is long in time consumption, complex in process and unfavorable for shape fixation; the carbon fiber spoke is formed at one time by utilizing the particularity of the carbon fiber product, the initial state of the connecting end is the shape of the equal diameter (equal cross section), the gap is further arranged, and the carbon fiber product is split along the carbon fiber filaments, so that the process is quite simple, and the carbon fiber spoke is far simpler than the secondary forming and has high accuracy. The core of this patent lies in that tip (link) of carbon fiber spoke sets up gap and corresponding rivet, utilizes mortise and tenon structure to realize expanding and close fit's effect, utilizes the close fit of edge 211 and side edge 111, finally realizes simple technology, stable in structure's novel carbon fiber spoke, and its mechanical properties of installing on rim/flower-drum is excellent, and the mounting means is simple, does benefit to the industry and popularizes and applies.

The above examples and illustrations are not intended to limit the form or style of the present utility model, and any suitable changes and modifications to them by those skilled in the art should be construed as not departing from the scope of the present utility model.

Claims

1. The utility model provides a novel carbon fiber spoke with mortise and tenon structure, includes a joint structure and a carbon fiber spoke, joint structure is used for installing carbon fiber spoke on outer structure, its characterized in that: the inside of the joint structure is provided with a penetrating hole penetrating front and back, at least part of the penetrating hole forms a reducing hole, the reducing hole is in a form of gradually reducing from front to back, and the reducing hole is provided with at least one longitudinal side edge; at least one end of the carbon fiber spoke is provided with a connecting end, the connecting end is provided with a mortise and tenon structure, and the mortise and tenon structure consists of a gap which is arranged inwards at the end part of the connecting end and riveting nails which are arranged in the gap and spread the connecting end outwards; the maximum section end of the connecting end of the carbon fiber spoke allows to pass through the minimum diameter reducing end of the diameter reducing hole, at least one edge is arranged on the periphery of the connecting end and corresponds to the side edge of the diameter reducing hole, the connecting end penetrates through the diameter reducing hole of the joint structure from the diameter reducing end of the diameter reducing hole of the joint structure, the riveting nail is riveted in the gap to prop the connecting end from the inside to the outside, tight fit between the outer part of the connecting end and the inner wall of the through hole of the joint structure is ensured, and especially, the edge on the periphery of the connecting end is tightly matched with the side edge of the diameter reducing hole.

2. A novel carbon fiber spoke with mortise and tenon structure as defined in claim 1, wherein: the connecting ends of the carbon fiber spokes are regular cylinders with equal cross sections before being provided with gaps.

3. A novel carbon fiber spoke with mortise and tenon structure as defined in claim 2, wherein: the connecting end of the carbon fiber spoke is a right cylinder with square, rectangle, trapezoid or triangle cross section before being provided with a gap.

4. A novel carbon fiber spoke with mortise and tenon structure as defined in claim 1, wherein: the connecting end is provided with a gap, and the length of the gap accounts for 60-80% of that of the connecting end.

5. A novel carbon fiber spoke with mortise and tenon structure as defined in claim 1, wherein: the shape of the riveting nail corresponds to the shape of the gap.

6. A novel carbon fiber spoke with mortise and tenon structure as defined in claim 1, wherein: the guiding cone angle alpha epsilon (0 degrees) of any longitudinal guiding edge of the diameter-reducing hole is 3.5 degrees.

7. A novel carbon fiber spoke with mortise and tenon structure as defined in claim 1, wherein: the inward gaps of the connecting ends divide the connecting ends of the carbon fiber spokes into at least two parts, and the gaps are arranged in a longitudinal direction and in a straight inward direction from the middle part of the connecting ends of the carbon fiber spokes; the rivet exhibits a thin-to-thick one-piece construction, matching the slit shape.

8. The novel carbon fiber spoke with mortise and tenon structure according to claim 7, wherein: the gap is a cross-shaped gap, the connecting end is bifurcated into four parts, and the riveting nail is of a cross-shaped structure from thin to thick and is matched with the cross-shaped gap in shape.

9. A novel carbon fiber spoke with mortise and tenon structure as defined in claim 1, wherein: the external threads are arranged at the outer part of the front end of the joint structure and are used for being screwed on a fixing structure corresponding to the rim/hub.