Shaft-tube joint structure of carbon fiber reinforced plastic drive shaft

Patent metadata

Field	Value
Publication number	US-11512734-B2
Application number	US-202016892521-A
Country	US
Kind code	B2
Filing date	Jun 4, 2020
Priority date	Jun 6, 2019
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

The present invention discloses a shaft-tube joint structure of a carbon fiber reinforced plastic (CFRP) drive shaft. The shaft-tube joint structure includes a hollow shaft tube, a plurality of first rectangular teeth being uniformly and circumferentially arranged at both ends of the hollow shaft tube; two shaft-tube joints which are respectively fixed at two ends of the hollow shaft tube, the thickness of the shaft-tube joint being smaller than that of the hollow shaft tube, and an inner wall of the shaft-tube joint being smoothly connected to an inner wall of the hollow shaft tube; and a universal joint, an end thereof being tubular, a plurality of second rectangular teeth being uniformly and circumferentially arranged, the universal joint being matched with and sleeving the outer wall of the shaft-tube joint, and the second rectangular teeth being meshed with the first rectangular teeth.

First claim

What is claimed is:

1. A shaft-tube joint structure of a carbon fiber reinforced plastic (CFRP) drive shaft, the shaft-tube joint structure comprising:
a hollow shaft tube, a plurality of first rectangular teeth being uniformly and circumferentially arranged at both ends of the hollow shaft tube;
two shaft-tube joints which are respectively fixed at two ends of the hollow shaft tube, a tube wall thickness of the shaft-tube joint being smaller than that of the hollow shaft tube, and an inner wall of the shaft-tube joint being connected to an inner wall of the hollow shaft tube; and
a universal joint, an end of the universal joint being tubular, a plurality of second rectangular teeth being uniformly and circumferentially arranged, the universal joint sleeving the outer wall of the shaft-tube joint, and the second rectangular teeth being meshed with the first rectangular teeth.

2. The shaft-tube joint structure of the CFRP drive shaft according to claim 1 , wherein the hollow shaft tube and the shaft-tube joint are both made of a CFRP, and carbon fibers are arranged at 0°, ±45° and 90° to an axial direction of the hollow shaft tube.

3. The shaft-tube joint structure of the CFRP drive shaft according to claim 2 , wherein:
the hollow shaft tube has a length of 200-5000 mm, an inner diameter of 10-200 mm and an outer diameter of 15-300 mm; and
an axial length of the shaft-tube joint is 5-100 mm.

4. The shaft-tube joint structure of the CFRP drive shaft according to claim 3 , wherein each of the rectangular teeth has a thickness of 3-30 mm.

5. The shaft-tube joint structure of the CFRP drive shaft according to claim 1 , wherein the tube wall thickness of the shaft-tube joint is 20%-60% that of the hollow shaft tube.

6. The shaft-tube joint structure of the CFRP drive shaft according to claim 5 , wherein the universal joint is made of steel B480QZR.

7. The shaft-tube joint structure of the CFRP drive shaft according to claim 6 , wherein the universal joint is connected to the hollow shaft tube and the shaft-tube joint by structural adhesive.

8. The shaft-tube joint structure of the CFRP drive shaft according to claim 7 , wherein the hollow shaft tube and the shaft-tube joint are manufactured by a hot press curing molding process.

9. The shaft-tube joint structure of the CFRP drive shaft according to claim 8 , wherein:
there are at least two first rectangular teeth; and
each of the first rectangular teeth form a central angle of 360°/(number of first rectangular teeth*2) in circumferential distribution on the hollow shaft tube.

10. The shaft-tube joint structure of the CFRP drive shaft according to claim 1 , wherein the other end of the universal joint is connected to a gearbox or a main reducer.

Assignees

• Univ Jilin

Inventors

• Wang Dengfeng
• Li Shenhua
• Xu Ke

Classifications

• F16C2240/60

  Thickness, e.g. thickness of coatings · CPC title

• F16C2240/70

  Diameters; Radii · CPC title

• F16D3/26

  Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected (F16D3/18, F16D3/20 take precedence) · CPC title

• F16C2208/02

  comprising fillers, fibres · CPC title

• F16C3/026 Primary

  Shafts made of fibre reinforced resin · CPC title