Carbon fiber transmission shaft

Abstract

The invention provides a carbon fiber transmission shaft which comprises a shaft tube, connecting pieces are fixedly arranged at the two ends of the shaft tube, the connecting pieces at the two ends of the shaft tube are fixedly connected with a sliding pair sleeve and a shaft fork respectively, the shaft tube is made of a carbon fiber composite material, and the connecting pieces, the sliding pair sleeve and the shaft fork are all made of aluminum alloy. The automobile transmission shaft solves the problems that a traditional automobile transmission shaft made of all-metal materials is large in weight, the driving performance of an automobile is affected, and lightweight design is not facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of automobile accessories, and in particular to a carbon fiber transmission shaft. Background Art

[0002] Lightweighting is an important direction for the current development of automobiles and an important means of energy conservation and emission reduction. The lightweighting of automobiles requires that the curb weight of the automobile be reduced as much as possible under the premise of ensuring the strength and safety performance of the automobile, so as to improve the power of the automobile, reduce fuel consumption, and reduce exhaust pollution. Experiments have shown that if the weight of the entire vehicle is reduced by 10%, the fuel efficiency can be improved by 6%-8%; for every 100 kg reduction in the curb weight of the automobile, the fuel consumption per 100 kilometers can be reduced by 0.3-0.6 liters; if the weight of the automobile is reduced by 1%, the fuel consumption can be reduced by 0.7%. At present, due to the needs of environmental protection and energy conservation, the lightweighting of automobiles has become a trend in the development of the world's automobiles.

[0003] The automobile drive shaft is an important component for transmitting power in the automobile transmission system. Its function is to transmit the power of the engine to the wheels together with the gearbox and drive axle, so that the car can generate driving force. The traditional tractor drive shaft is made of all-metal material. This structure is heavy, which affects the vehicle's driving performance and is not conducive to lightweight design. Therefore, it is necessary to invent a carbon fiber drive shaft. Summary of the invention

[0004] The technical problem to be solved by the present invention is to solve the problem that the traditional all-metal automobile transmission shaft is heavy, affects the driving performance of the automobile, and is not conducive to lightweight design.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A carbon fiber transmission shaft comprises a shaft tube 1, wherein both ends of the shaft tube 1 are fixedly provided with connecting pieces 2, and the connecting pieces 2 at both ends of the shaft tube 1 are respectively fixedly connected to a sliding sleeve 4 and a shaft fork 5. The material of the shaft tube 1 is a carbon fiber composite material, and the materials of the connecting piece 2, the sliding sleeve 4 and the shaft fork 5 are all aluminum alloy.

[0007] Furthermore, both ends of the shaft tube are respectively sleeved on a group of connecting pieces, the connecting pieces are interference fit with the shaft tube, and the connecting pieces are fixedly connected to the shaft tube by gluing and riveting.

[0008] Furthermore, the riveted structure includes a riveted ring group distributed on the connecting piece and the circumferential walls at both ends of the shaft tube, and the riveted ring group includes a first riveted ring, a second riveted ring, and a third riveted ring which are sequentially arranged in parallel.

[0009] Furthermore, a protective sleeve is provided on the shaft tube at the position where the riveting ring group is distributed.

[0010] Furthermore, the riveting points on the first riveting ring, the second riveting ring and the third riveting ring are distributed in a circular array on the peripheral walls of the connecting piece and the two ends of the shaft tube.

[0011] Further, the riveting points on the first riveting ring are arranged in groups, the riveting points on the second riveting ring are arranged in groups, and the riveting points on the third riveting ring are arranged in groups.

[0012] Furthermore, the rivet points on the first rivet ring and the rivet points on the second rivet ring have an axial staggered angle of 30°, and the rivet points on the second rivet ring and the rivet points on the third rivet ring have an axial staggered angle of 30°.

[0013] Furthermore, the wall thickness of the shaft tube is 8 to 9 mm.

[0014] Furthermore, the wall thickness of the shaft tube is 8.25 mm.

[0015] Furthermore, the connecting piece is fixedly connected to the sliding sleeve and the shaft fork by friction welding.

[0016] The beneficial effects of the present invention are as follows: the carbon fiber transmission shaft of the present invention can reduce weight by 30% to 40% compared with the original pure steel transmission shaft under the premise of meeting all technical requirements, and has the advantages of extremely high static torque resistance, light weight, high strength, convenient molding, and long fatigue life, thereby improving the structural strength of the entire vehicle and reducing the amount of consumables.

[0017] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a structural diagram of a carbon fiber transmission shaft of the present invention.

[0019] Figure 2 This is an exploded view of a carbon fiber transmission shaft of the present invention.

[0020] Figure 3 This is a cross-sectional view of a carbon fiber transmission shaft of the present invention.

[0021] Figure 4 This is a distribution diagram of six riveting points of three rows of staggered riveting rings in the riveting ring group of the present invention.

[0022] Figure 5 for Figure 4 AA cross-section diagram.

[0023] Figure 6 This is the distribution diagram of eight rivet points in three rows of non-staggered riveted rings. DETAILED DESCRIPTION

[0024] like Figures 1 to 3A carbon fiber transmission shaft shown includes a shaft tube 1, and connecting parts 2 are fixedly provided at both ends of the shaft tube 1. The connecting parts 2 at both ends of the shaft tube 1 are respectively fixedly connected to the sliding sleeve 4 and the shaft fork 5. The material of the shaft tube 1 is carbon fiber composite material, and the materials of the connecting part 2, the sliding sleeve 4 and the shaft fork 5 are all aluminum alloy.

[0025] Before connecting with the shaft tube 1, the connectors 2 at the left and right ends of the shaft tube 1 are fixedly connected to the sliding sleeve 4 and the shaft fork 5 respectively to form a sliding sleeve connector and a shaft fork connector respectively. Finally, the sliding sleeve connector and the shaft fork connector are fixedly connected to the shaft tube 1 respectively.

[0026] The shaft tube 1 is formed by wet winding of carbon fiber filaments and epoxy resin. The connectors 2, sliding sleeves 4 and shaft forks 5 at the left and right ends of the shaft tube 1 are all made of aluminum alloy. All the above-mentioned parts are connected to form a high-torque carbon fiber drive shaft for tractors. The connection method between the aluminum alloy connector of the high-torque carbon fiber drive shaft for tractors and the carbon fiber shaft tube body has been theoretically calculated, simulated and tested, and is an optimized one among multiple connection methods.

[0027] Preferably, in combination with the above solution, the two ends of the shaft tube 1 are respectively sleeved on a set of connectors 2, the connectors 2 are interference fit with the shaft tube 1, and the connectors 2 are fixedly connected to the shaft tube 1 by gluing and riveting. Compared with the original connection method, this connection method significantly increases the torque of the carbon fiber transmission shaft and improves the flexibility a lot.

[0028] Preferably, in combination with the above scheme, Figure 2 As shown, in order to make the riveting more secure, the riveted structure includes a riveting ring group distributed on the connecting piece 2 and the circumferential wall at both ends of the shaft tube 1, and the riveting ring group includes a first riveting ring 11, a second riveting ring 12, and a third riveting ring 13 which are arranged in parallel in sequence.

[0029] Preferably, in combination with the above scheme, Figure 2 As shown, in order to protect the riveted parts and improve the appearance, the position where the riveted ring group is distributed on the shaft tube 1 is provided with a protective sleeve 3. The protective sleeve 3 is also made of aluminum alloy.

[0030] Preferably, in combination with the above scheme, Figure 3 As shown, in order to make the riveting more firm and the force more uniform, the riveting points on the first riveting ring 11, the second riveting ring 12, and the third riveting ring 13 are distributed in a circular array on the peripheral walls of the connector 2 and the shaft tube 1 at both ends.

[0031] Preferably, in combination with the above scheme, Figure 3 and Figure 4As shown, in order to make the force more uniform, ensure the maximum torsion angle of the shaft tube and ensure the experimental torque while reducing the number of riveting points, 6 groups of riveting points are set on the first riveting ring 11, 6 groups of riveting points are set on the second riveting ring 12, and 6 groups of riveting points are set on the third riveting ring 13.

[0032] Preferably, in combination with the above scheme, Figure 3 and Figure 4 As shown, the staggered angle of the riveting points on the first riveting ring 11 and the second riveting ring 12 in the axial direction is 30°, and the staggered angle of the riveting points on the second riveting ring 12 and the third riveting ring 13 in the axial direction is 30°. Compared with the solution of three rows of non-staggered riveting rings and eight riveting points, the maximum torsion angle and experimental torque of the shaft tube are significantly enhanced.

[0033] Preferably, in combination with the above solution, in order to ensure lightweight design while ensuring the torsion angle and torque, the wall thickness of the shaft tube 1 is 8 to 9 mm.

[0034] Preferably, in combination with the above solution, the wall thickness of the shaft tube 1 is 8.25 mm, which is the optimal thickness obtained by testing the transmission shaft under the optimal mechanical properties.

[0035] Preferably, in combination with the above solution, in order to ensure a more secure connection, the connecting member 2 is fixedly connected to the sliding sleeve 4 and the shaft fork 5 by rotary friction welding of aluminum alloy.

[0036]

[0037] In order to verify the performance of the rivet connection distribution scheme in the present invention, one end of the transmission shaft in the present invention is fixed, and the other end is connected to the static torsion test equipment, and the torque is loaded until the sample is damaged or the maximum capacity of the equipment is reached.

[0038] It can be seen from the data of the five schemes in the above table that when the drive shaft of the present invention uses three rows of staggered riveted rings and six rivet points (666 staggered), compared with other riveting arrangements, the torque performance is greatly enhanced and the overall performance is also greatly improved.

[0039] In the description of the present invention, it is necessary to understand that terms such as "upper", "lower", "front", "back", "left", "right", "bottom", "inside", "outside", "one end", "one side", "two ends", "both sides", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they all fall within the protection scope of the present invention.

Claims

1. A carbon fiber transmission shaft, comprising a shaft tube (1), characterized in that: Connecting pieces (2) are fixedly provided at both ends of the shaft tube (1); the connecting pieces (2) at both ends of the shaft tube (1) are fixedly connected to the sliding sleeve (4) and the shaft fork (5) respectively; the material of the shaft tube (1) is a carbon fiber composite material; the materials of the connecting piece (2), the sliding sleeve (4) and the shaft fork (5) are all aluminum alloy.

2. The carbon fiber transmission shaft according to claim 1, characterized in that: The two ends of the shaft tube (1) are respectively sleeved on a group of connecting pieces (2); the connecting pieces (2) and the shaft tube (1) are interference fit; the connecting pieces (2) are fixedly connected to the shaft tube (1) by gluing and riveting.

3. The carbon fiber transmission shaft according to claim 2, characterized in that: The riveted structure comprises a riveted ring group distributed on the peripheral walls of both ends of the connecting piece (2) and the shaft tube (1), and the riveted ring group comprises a first riveted ring (11), a second riveted ring (12), and a third riveted ring (13) which are sequentially arranged in parallel.

4. The carbon fiber transmission shaft according to claim 3, characterized in that: A protective sleeve (3) is sleeved on the shaft tube (1) at the position where the riveting ring group is distributed.

5. The carbon fiber transmission shaft according to claim 3, characterized in that: The riveting points on the first riveting ring (11), the second riveting ring (12) and the third riveting ring (13) are distributed in a circular array on the peripheral walls of the connecting piece (2) and the two ends of the shaft tube (1).

6. The carbon fiber transmission shaft according to claim 5, characterized in that: The first riveting ring (11) is provided with 6 groups of riveting points, the second riveting ring (12) is provided with 6 groups of riveting points, and the third riveting ring (13) is provided with 6 groups of riveting points.

7. The carbon fiber transmission shaft according to claim 6, characterized in that: The rivet points on the first rivet ring (11) and the rivet points on the second rivet ring (12) are staggered at an angle of 30° in the axial direction, and the rivet points on the second rivet ring (12) and the rivet points on the third rivet ring (13) are staggered at an angle of 30° in the axial direction.

8. The carbon fiber transmission shaft according to any one of claims 1 to 4, characterized in that: The wall thickness of the shaft tube (1) is 8 to 9 mm.

9. The carbon fiber transmission shaft according to any one of claim 8, characterized in that: The wall thickness of the shaft tube (1) is 8.25 mm.

10. The carbon fiber transmission shaft according to claim 1, characterized in that: The connecting piece (2) is fixedly connected to the sliding sleeve (4) and the shaft fork (5) by friction welding.

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