CN219523558U

CN219523558U - Novel carbon fiber spoke with mortise and tenon structure

Info

Publication number: CN219523558U
Application number: CN202223605357.1U
Authority: CN
Inventors: 邱景生
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-08-15
Anticipated expiration: 2032-12-30

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 a through hole (conical hole) penetrating front and back is 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 diameter D2 of the connecting end of the carbon fiber spoke is smaller than or equal to the minimum diameter D1 of the conical hole, the connecting end penetrates through the conical hole from the conical Kong Sujing end of the joint structure, the connecting end is outwards propped open from the inside in the gap by the riveting nail, the tight fit between the outer part of the connecting end and the inner wall of the through hole of the joint structure is ensured, the mechanical property and the stability of the pure mechanical structure of the mortise and tenon structure are effectively utilized, the carbon fiber spoke is fixed in the joint structure, and the effective fixation with the 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, current carbon fiber spokes are usually with metal's tooth cap and cap head nest to the both ends of carbon fiber spoke body respectively, then fix through the veneer mode, make tooth cap and cap head and carbon fiber spoke body together, and then utilize tooth cap and cap head and external structure to realize fixing, but this kind of design is higher to the bonding strength requirement of veneer technique and adhesive, and still there is the risk of coming unstuck, and then influence carbon fiber spoke's stability in use and security, in addition, glue is when gluing, the effect controllability to gluing is poor, especially in the higher field of precision requirement, how effectively fix when gluing, in order to guarantee gluing precision, it is actually a very difficult thing. 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 coordination become 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 to provide a novel carbon fiber spoke with a mortise and tenon structure, which enables the carbon fiber spoke to be more firmly installed on an external structure, such as a rim/hub, through 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.

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, at least part of the penetrating hole forms a conical hole, and the diameter of the conical hole is reduced from front to back; 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 diameter D2 of the connecting end of the carbon fiber spoke is smaller than or equal to the minimum diameter D1 of the conical hole, the connecting end penetrates through the conical hole of the joint structure from the conical Kong Sujing end of the joint structure, and the riveting nail is riveted in the gap to open the connecting end from inside to outside, so that the outer part of the connecting end is tightly matched with the inner wall of the penetrating hole of the joint structure.

Further, the connecting ends of the carbon fiber spokes are in a cylindrical shape with equal diameters before being provided with gaps.

Further, the length of the gap arranged at the connecting end 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 cone angle alpha of the cone-shaped hole is [ 1 DEG, 3.5 DEG ].

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, 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 outer shape of the connecting ends is consistent with the shape of the conical holes of the joint structure, and the connecting ends of the carbon fiber spokes can be tightly fixed on the inner walls of the conical holes in the joint structure by pulling the joint structure forwards only, so that the connecting ends can be tightly matched with the through holes of the joint structure, the tight matching of the connecting ends of the carbon fiber spokes and the connecting structure is effectively ensured by the physical (mechanical) structure, and then the connecting ends are fixed with the fixing structure on the rim/hub through the connecting structure. When the carbon fiber spoke is used, if the tensile force is applied, the carbon fiber spoke and the conical hole 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 the carbon fiber spokes of the present utility model;

FIG. 6 is a schematic view of the rivet of the present utility model;

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

fig. 8 is a schematic cross-sectional view of the assembled utility model.

Detailed Description

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

Referring to fig. 1 to 8, a novel carbon fiber spoke 2 includes a joint structure 1 and a carbon fiber spoke 2, wherein 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 tapered hole 11, the diameter of the tapered hole 11 is reduced from front to back, and an external thread 12 is provided outside the front end of the joint structure 1 for being screwed on a fixing structure corresponding to 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 20, the mortise and tenon structure 20 is composed of a gap 22 which is arranged inwards of the connecting end 21 and a riveting nail 3 which corresponds to the shape of the gap 22, in the embodiment, the connecting end 21 of the carbon fiber spoke 2 is in a cylindrical shape with equal diameter before the gap 22 is arranged, the cylindrical shape with equal diameter is arranged, the production of the carbon fiber spoke is facilitated, the production process is simpler and faster, the gap 22 is arranged inwards of the end part of the cylindrical connecting end with equal diameter, and the connecting end 21 of the carbon fiber spoke 2 is bifurcated into two parts by the inwards arranged gap 22; in this embodiment, since the connection end 21 of the carbon fiber spoke 2 is broken by the slit 22 and the slit 22 is naturally loosened to generate an opening, the maximum diameter D2 of the connection end 21 of the carbon fiber spoke 2 is the diameter before the connection end 21 is provided with the slit 22 plus the opening size of the slit 22, and the connection end 21 passes through the tapered hole 11 from the tapered hole 11 reduced diameter end (the minimum diameter D1 end) of the joint structure 1, in this embodiment, since the slit 22 is split in a longitudinal direction and inward from the middle of the end of the connection end 21 of the carbon fiber spoke 2; whereas the rivet 3 exhibits a thin-to-thick one-piece structure matching the shape of the slit 22; as shown in fig. 7 and 8, the thin end of the rivet 3 extends into the gap 22, so that the rivet 3 is riveted in the gap 22, and the connection end 21 is ensured to be opened outwards (two sheets are opened outwards respectively), in this embodiment, the total length of the connection end 21 of the carbon fiber spoke is larger than that of the joint structure 1, the connection end penetrates through the tapered hole from the tapered hole 11 diameter end of the joint structure, and after the rivet is riveted in the gap to open the connection end outwards from the inside, the joint structure can be pulled forwards, so that tight fit between the outer part of the connection end and the inner wall of the through hole (the tapered hole 11) of the joint structure 1 is ensured, tight fit between the connection end 21 of the carbon fiber spoke 2 and the connection structure is ensured effectively through a physical structure, and then the connection structure is fixed with a fixing structure on a rim/hub, and the connection structure is generally screwed and fixed on the rim/hub.

In this embodiment, the length of the gap 22 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 taper presented by the outer wall of the connection end after the connection end is spread is in a reasonable range, so as to realize more effective matching with the tapered hole 11, i.e. the area of the connection end 21 tightly matched with the tapered 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 taper angle α∈1 °,3.5 ° of the taper hole 11 is a more reasonable taper design.

Due to the taper design of the taper hole 11, when the carbon fiber spoke is in use, if the function of tension is applied, the carbon fiber spoke 2 and the taper hole 11 are pulled more and more tightly, so that the tensile strength and the stability of the carbon fiber spoke during fixing are greatly improved.

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 22 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 large 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 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 conical hole, and the diameter of the conical hole is reduced from front to back; 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 diameter D2 of the connecting end of the carbon fiber spoke is smaller than or equal to the minimum diameter D1 of the conical hole, the connecting end penetrates through the conical hole of the joint structure from the conical Kong Sujing end of the joint structure, and the riveting nail is riveted in the gap to open the connecting end from inside to outside, so that the outer part of the connecting end is tightly matched with the inner wall of the penetrating hole of the joint structure.

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 in a cylindrical shape with equal diameters before being provided with gaps.

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

4. 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.

5. A novel carbon fiber spoke with mortise and tenon structure as defined in claim 1, wherein: the cone angle alpha of the conical hole is [ 1 DEG, 3.5 ].

6. 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.

7. 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.