Joint of transmission shaft

Abstract

The utility model relates to the field of automobile transmission shafts, in particular to a connector of a transmission shaft. Comprising a universal joint assembly and a transmission shaft head connected with the universal joint assembly, wherein the transmission shaft head is connected with a shaft body assembly; the shaft body assembly comprises a metal shaft head and a carbon fiber shaft body, the carbon fiber shaft body is wound in the length direction of the metal shaft head, and the metal shaft head and the carbon fiber shaft body are connected through a bonding rubber ring; the metal shaft head and the carbon fiber shaft body are connected in an adhesion mode, the contact area of the metal shaft head and the carbon fiber shaft body can be increased through adhesion, meanwhile, a plurality of grooves are formed in the metal shaft head, a plurality of protrusions are arranged on the carbon fiber shaft body, and the grooves are meshed with the protrusions. The connecting strength of the metal shaft head and the carbon fiber shaft body can be improved, and rotation and sliding of the meshing portion of the transmission shaft in the torque transmission process can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the field of automotive drive shafts, and particularly to a joint of a drive shaft. Background Art

[0002] With the continuous development and progress of the automotive industry, people's demands for automotive performance and lightweight are also increasing day by day. Among the key components of automobiles, the drive shaft, as the core component for power transmission, its performance directly affects the overall performance of the vehicle. Traditionally, drive shafts are mostly made of steel. Although they are strong and durable, due to their high mass, they have a large moment of inertia, which in turn limits the acceleration performance and fuel economy of the vehicle. At the same time, the bending natural frequency of the steel drive shaft is relatively low, and it is easy to generate vibration and noise during high-speed driving, affecting the riding comfort of passengers, that is, the NVH (Noise, Vibration, Harshness) performance is not good. In this context, carbon fiber composite materials stand out with their unique advantages. Carbon fiber composite materials not only have an extremely low density, achieving a significant lightweight effect, but also possess excellent torsional rigidity and high specific modulus, and can maintain or even improve the strength and stability of the drive shaft while reducing weight. Therefore, carbon fiber composite materials are ideal materials for producing drive shafts.

[0003] However, with the widespread application of carbon fiber composite drive shafts in vehicles, the connection reliability of the metal shaft head and the carbon fiber shaft body assembly joint has become a problem that people need to solve. Due to the large differences in the physical and chemical properties between carbon fiber composite materials and metal materials, traditional connection methods are difficult to ensure a firm combination between the two, resulting in multiple cases of joint detachment in the market, thus affecting the safety of the vehicle. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a joint of a drive shaft to solve the problem that the joint between the metal shaft head and the carbon fiber shaft body assembly in the background art is prone to detachment.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A joint of a drive shaft of the utility model includes a universal joint assembly and a drive shaft head connected to the universal joint assembly, wherein the drive shaft head is connected to the shaft body assembly; the shaft body assembly includes a metal shaft head and a carbon fiber shaft body, the carbon fiber shaft body is wound along the length direction of the metal shaft head, and the metal shaft head and the carbon fiber shaft body are connected by an adhesive rubber ring.

[0007] Further improvement, a plurality of grooves are provided on the metal shaft head, and protrusions are provided on the carbon fiber shaft body, wherein the grooves and the protrusions are adapted to each other.

[0008] Further improvement, the grooves and the protrusions are inclined.

[0009] For further improvement, the inclination angle is 1° to 2°.

[0010] For further improvement, the adhesive rubber ring is filled between the groove and the protrusion.

[0011] For further improvement, the thickness of the adhesive rubber ring is 8μm to 15μm.

[0012] For further improvement, the adhesive rubber ring is one of polyurethane glue, epoxy resin glue, phenolic glue and polycarbonate.

[0013] For further improvement, the shaft assembly is a hollow tubular structure.

[0014] For further improvement, the central axes of the universal joint assembly, the transmission shaft head and the shaft assembly coincide.

[0015] For further improvement, the shaft assembly is welded to the transmission shaft head.

[0016] The utility model has achieved the following technical effects compared with the prior art:

[0017] In the utility model, the metal shaft head and the carbon fiber shaft body are connected by adhesion, which can ensure that the adhesive layer can be evenly and firmly attached to the surfaces of the metal shaft head and the carbon fiber shaft body, so as to increase the contact area between the metal shaft head and the carbon fiber shaft body, form a strong intermolecular bonding force, and thus greatly improve the connection strength.

[0018] In the utility model, a plurality of grooves are provided on the metal shaft head, and a plurality of protrusions are provided at corresponding positions on the carbon fiber shaft body. The grooves and the protrusions are engaged with each other, which not only effectively prevents the connection part from rotating and sliding when the transmission shaft transmits large torque, but also significantly reduces the wear and heat accumulation caused by slippage, and prolongs the service life of the transmission shaft; at the same time, the meshing design of the grooves and the protrusions also optimizes the shear stress distribution borne by the adhesive rubber ring. During transmission, due to the mutual restraint of the meshing parts, the adhesive rubber ring no longer needs to bear all the shear stress alone, thus reducing its burden, further enhancing the connection reliability, and ensuring the stability and safety of the transmission shaft during long-term use.

[0019] A joint of a transmission shaft of the utility model can adapt to different load and vibration environments. With the double guarantee of the adhesive rubber ring and the meshing structure, the connection between the joint and the shaft body is made more firm, and the situation of the joint falling off from the shaft body is reduced. This not only improves the overall safety of the vehicle, but also reduces the risk of traffic accidents caused by transmission shaft failures. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 Internal schematic diagram of the overall structure of the present utility model;

[0022] Figure 3 Schematic diagram of the connection between the shaft head and the shaft body assembly of the drive shaft of the present utility model;

[0023] Figure 4 Schematic diagram of the shaft body assembly of the present utility model.

[0024] Reference numerals in the drawings: 1, universal joint assembly; 2, drive shaft shaft head; 3, shaft body assembly; 3.1, metal shaft head; 3.2, carbon fiber shaft body; 3.3, bonding rubber ring. Detailed implementation manners

[0025] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents that fall within the spirit and scope of the appended claims.

[0026] The examples of the present application will be described in detail below. The examples of the examples are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The examples described below by referring to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as a limitation to the present application.

[0027] Embodiment 1

[0028] A joint of a drive shaft of the present utility model includes a universal joint assembly 1 and a drive shaft shaft head 2 connected to the universal joint assembly 1, wherein the drive shaft shaft head 2 is connected to a shaft body assembly 3; the shaft body assembly 3 includes a metal shaft head 3.1 and a carbon fiber shaft body 3.2, the carbon fiber shaft body 3.2 is wound along the length direction of the metal shaft head 3.1, and the metal shaft head 3.1 and the carbon fiber shaft body 3.2 are connected by a bonding rubber ring 3.3.

[0029] For example, in the embodiment Figure 1 and Figure 2 As shown in the schematic diagram of the overall structure of the present utility model, the shaft body assembly 3, the drive shaft shaft head 2 and the universal joint assembly 1 are connected in sequence from left to right as shown in the figure; Figure 2 As shown in the figure, the universal joint assembly 1 and the drive shaft shaft head 2 are preferably integrally connected. On the one hand, the integral connection is convenient for manufacturing by an integral molding method, which can improve the manufacturing efficiency. On the other hand, it can also improve the connection reliability between the universal joint assembly 1 and the drive shaft shaft head 2.

[0030] Figure 2 The central shaft assembly 3 is preferably welded to the shaft head 2 of the transmission shaft, specifically by friction welding. Friction welding has high and stable quality, and the dimensional accuracy and geometric accuracy of the welded parts are high.

[0031] In the embodiment, a plurality of grooves are provided on the metal shaft head 3.1, and protrusions are provided on the carbon fiber shaft body 3.2, and the grooves and the protrusions are adapted to each other. The grooves and the protrusions are inclined. Figure 3 and Figure 4 As shown, the carbon fiber shaft body 3.2 is wound around the metal shaft head 3.1. The groove and protrusion structure provided can effectively prevent the rotational sliding of the meshing part during the torque transmission of the transmission shaft. The size of the groove matches the size of the protrusion, and the two can be meshed and connected. In the embodiment, the grooves and the protrusions are inclined. When the inclined grooves and protrusions are connected, the meshing length between the metal shaft head 3.1 and the carbon fiber shaft body 3.2 can be further increased, thereby increasing the bonding strength when connected by the bonding rubber ring 3.3.

[0032] Figure 4 Shown in the figure is a schematic diagram of the groove and the protrusion. The protrusion is similar to a trapezoid, and the shape of the groove is adapted to the protrusion. According to specific usage scenarios or different processing requirements, the shapes of the groove and the protrusion can be changed as long as they can be meshed with each other.

[0033] The inclination angle is 1° to 2°. Figure 3 and Figure 4 As shown, in the embodiment, the inclination angle is 1° to 2°, which can be 1°, 1.1°, 1.2°, 1.3°, 1.4°, 1.5°, 1.6°, 1.7°, 1.8°, 1.9° and 2°. In the embodiment, the inclination angle is preferably 1°. When the inclined grooves and protrusions are connected, the meshing length can be further increased, thereby preventing the joint and the shaft body from falling off each other.

[0034] The bonding rubber ring 3.3 is filled between the groove and the protrusion. The thickness of the bonding rubber ring 3.3 is 8μm to 135μm. As in the embodiment Figure 4 Shown, there is a gap between the groove and the protrusion, and the gap can be used for filling the bonding rubber ring 3.3. The bonding rubber ring 3.3 can bond the metal shaft head 3.1 and the carbon fiber shaft body 3.2 together. Specifically, the thickness of the bonding rubber ring 3.3 is 8μm to 15μm, which can be 8μm, 9μm, 10μm, 11μm, 12μm, 13μm, 14μm and 15μm. The thickness of the bonding rubber ring 3.3 in the embodiment is preferably 13μm. The specific thickness of the bonding rubber ring 3.3 can ensure the connection between the metal shaft head 3.1 and the carbon fiber shaft body 3.2 while keeping the overall thickness of the whole structure within a suitable range.

[0035] In the embodiment, the bonding rubber ring 3.3 is preferably a polyurethane adhesive, but it is not limited thereto. Other materials that achieve the same effect as the polyurethane adhesive can also be used, specifically, epoxy resin adhesive, phenolic adhesive, polyether ester material, polycarbonate, and silane-modified polyether adhesive, etc. Different materials can be selected according to the specific usage scenario.

[0036] The shaft body assembly 3 is a hollow tubular structure. In the embodiment, the shaft body assembly 3 is a hollow tubular structure, and both ends of the shaft body assembly 3 are connected to the drive shaft head 2.

[0037] The central axes of the universal joint assembly 1, the drive shaft head 2, and the shaft body assembly 3 coincide. Figure 2 As shown, the coincidence of the central axes of the universal joint assembly 1, the drive shaft head 2, and the shaft body assembly 3 can ensure the stability of the entire structure, enhancing the structural stability of the entire transmission system. Secondly, it can reduce vibration and noise. When the central axes coincide, it means that the offset and distortion during power transmission are minimized, thereby reducing the resulting vibration and noise, and improving the vehicle transmission efficiency. Finally, it can also make the power transmission more direct and efficient, reducing the energy loss during transmission.

[0038] In the present utility model, the metal shaft head 3.1 and the carbon fiber shaft body 3.2 are connected by adhesion, which can ensure that the bonding layer can be evenly and firmly attached to the surfaces of the metal shaft head 3.1 and the carbon fiber shaft body 3.2, increasing the contact area between the metal shaft head 3.1 and the carbon fiber shaft body 3.2, forming a strong intermolecular bonding force, and thus significantly improving the connection strength.

[0039] In the present utility model, multiple grooves are provided on the metal shaft head 3.1, and multiple protrusions are provided at corresponding positions on the carbon fiber shaft body 3.2. The grooves and the protrusions are engaged with each other, which not only effectively prevents the connection part from rotating and sliding when the drive shaft transmits large torque, but also significantly reduces the wear and heat accumulation caused by slippage, extending the service life of the drive shaft. At the same time, the meshing design of the grooves and the protrusions also optimizes the shear stress distribution borne by the bonding rubber ring 3.3. During transmission, due to the mutual restraint of the meshing parts, the bonding rubber ring 3.3 no longer needs to bear all the shear stress alone, thereby reducing its burden, further enhancing the reliability of the connection, and ensuring the stability and safety of the drive shaft during long-term use.

[0040] A joint of a drive shaft of the present utility model can adapt to different load and vibration environments. With the double guarantee of the bonding rubber ring 3.3 and the meshing structure, the connection between the joint and the shaft body is made more firm, reducing the occurrence of the joint and the shaft body falling off. This not only improves the overall safety of the vehicle but also reduces the risk of traffic accidents caused by drive shaft failures.

[0041] Embodiment 2

[0042] This embodiment is basically the same as Embodiment 1, except that this embodiment provides an automobile, which includes a joint of a drive shaft in Embodiment 1.

[0043] It should be noted that in the description of this application, terms such as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0044] Any process or method description shown in the flowchart or described in other ways herein can be understood to represent a module, segment, or part of code including one or more executable instructions for implementing a specific logical function or process. The scope of the preferred embodiments of this application includes additional implementations, where the functions may be executed in a substantially simultaneous manner or in the reverse order according to the functions involved, rather than in the order shown or discussed, which should be understood by those skilled in the technical field to which the embodiments of this application belong.

[0045] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0046] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A transmission shaft joint, characterized in that: It includes a universal joint assembly and a transmission shaft head connected to the universal joint assembly, wherein the transmission shaft head is connected to the shaft body assembly; The shaft assembly includes a metal shaft head and a carbon fiber shaft body. The carbon fiber shaft body is wound along the length direction of the metal shaft head. The metal shaft head and the carbon fiber shaft body are connected via an adhesive rubber ring.

2. A transmission shaft joint according to claim 1, characterized in that: The metal shaft head is provided with a plurality of grooves, and the carbon fiber shaft body is provided with protrusions, wherein the grooves are adapted to the protrusions.

3. A transmission shaft joint according to claim 2, characterized in that: The groove and the protrusion are arranged obliquely.

4. A transmission shaft joint according to claim 3, characterized in that: The angle of the tilt setting is 1° to 2°.

5. A transmission shaft joint according to claim 1 or 2, characterized in that: The adhesive rubber ring is filled between the groove and the protrusion.

6. A transmission shaft joint according to claim 5, characterized in that: The thickness of the adhesive rubber ring is 8μm to 15μm.

7. A transmission shaft joint according to claim 6, characterized in that: The adhesive rubber ring is one of polyurethane glue, epoxy resin glue, phenolic glue and polycarbonate.

8. The transmission shaft joint according to claim 1, characterized in that: The shaft body is generally a hollow tubular structure.

9. The transmission shaft joint according to claim 1, characterized in that: The central axes of the universal joint assembly, the transmission shaft head and the shaft body assembly coincide with each other.

10. The transmission shaft joint according to claim 1, characterized in that: The shaft body assembly is connected to the drive shaft head by welding.

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