Carbon fiber track bicycle and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2025282442-A1
Application number	US-202418625244-A
Country	US
Kind code	A1
Filing date	Apr 3, 2024
Priority date	Mar 7, 2024
Publication date	Sep 11, 2025
Grant date	—

Abstract

Provide are a carbon fiber field bicycle and a manufacturing method thereof. The frame includes a frame formed by the integrated solidification of carbon fiber. The frame includes a front triangular structure composed of an upper tube, a lower tube, and a seat tube; and a rear triangular structure composed of a seat branch tube, a transmission branch tube, and a seat tube. The fiber layers corresponding to the tube fittings forming the front triangular structure is distributed along the axial direction of the corresponding tube fittings. In view of the current problem of poor strength and rigidity of track bicycles, a carbon fiber integrated frame is adopted as the main structure, and the fiber layer distribution of each tube component and key node position of the frame is optimized to ensure continuous distribution of carbon fibers and improve the strength of track bicycles.

First claim

What is claimed is:

1 . A carbon fiber track bicycle, comprising a frame formed by carbon fiber integrated solidification, wherein the frame comprises a front triangular structure composed of an upper tube, a lower tube, and a seat tube, and a rear triangular structure composed of a seat branch tube, a transmission branch tube, and a seat tube; fiber layers corresponding to tube fittings forming the front triangular structure is distributed along an axial direction of the corresponding tube fittings; the seat branch tube is distributed with fiber layers in two different directions, the transmission branch tube is distributed with fiber layers in three different directions, and a five-way tube is distributed with fiber layers in four different directions.

2 . The carbon fiber track bicycle according to claim 1 , wherein two distribution directions of the fiber layers corresponding to the seat branch tube are perpendicular to each other; two distribution directions of the fiber layers corresponding to the transmission branch tube are perpendicular to each other, and another distribution direction of the fiber layers corresponding to the transmission branch tube is located on an angular bisector of the two distribution directions.

3 . The carbon fiber track bicycle according to claim 2 , wherein four distribution directions of the fiber layers corresponding to the five-way tube are arranged in an asterisk shape.

4 . The carbon fiber track bicycle according to claim 1 , wherein a cross-section area of the upper tube perpendicular to its axis gradually decreases along a direction from a front wheel to a rear wheel, and an outer circumference of the upper tube is a conical surface; a cross-section of the lower tube perpendicular to its axis direction is elliptical in shape, and a head tube is provided at the junction of the upper tube and the lower tube using a surface extension; and the seat tube uses a box tube type.

5 . The carbon fiber track bicycle according to claim 4 , wherein a top surface of the upper tube extends an airfoil protrusion, and an outer surface of the airfoil protrusion is streamlined.

6 . The carbon fiber track bicycle according to claim 1 , wherein an embedded block is provided at a connection position between the transmission branch tube and the seat branch tube, and a U-shaped groove with an opening facing backwards is provided on the embedded block.

7 . The carbon fiber track bicycle according to claim 1 , wherein the seat tube is matched with a seat support tube, and a seat system is connected above the seat support tube; the seat system comprises a saddle, a support frame, and an adjustment assembly; the saddle is fixed to the support frame, and the support frame is connected to the seat support tube through the adjustment assembly.

8 . The carbon fiber track bicycle according to claim 7 , wherein the saddle is a streamlined structure, the seat support tube is in a sliding insertion connection with the seat tube are in a sliding insertion connection, and provided with a locking structure.

9 . A manufacturing method for the carbon fiber track bicycle according to claim 1 , comprising:
cutting carbon fiber cloth to obtain carbon cloth pieces, and winding the carbon cloth pieces into an inner core mold according to a preset layout method; painting a mold release agent to an outer mold shell, then placing the inner core mold wrapped with the carbon cloth pieces inside the outer mold shell; heating and pressurizing to solidify the carbon cloth pieces into shape, removing the inner core mold to obtain a carbon fiber integrated frame; installing other assemblies of the track bike onto the carbon fiber integrated frame.

10 . The manufacturing method according to claim 9 , wherein the carbon cloth pieces are wound according to a laying manner and quantity, and adjacent carbon cloth pieces are spliced together along the width direction at the carbon fiber connection.

Assignees

• Univ Qingdao Technology

Inventors

• Xu Wenhao
• Li Changhe
• Xu Peiming
• Wang Wei
• Wang Chunqing
• Deng Longxun
• Nie Jinquan
• Zhang Yanbin
• Ji Changhe

Classifications

• B62K19/18

  Joints between frame members · CPC title

• B62K19/02

  characterised by material or cross-section of frame members · CPC title

• B62J1/08

  Frames for saddles; Connections between saddle frames and seat pillars; Seat pillars (attaching seat pillars to cycle frames B62K19/36) · CPC title

• B62K19/16 Primary

  the material being wholly or mainly of plastics · CPC title

• B62K3/04 Primary

  having a substantially horizontal top bar · CPC title