Transmission shaft and vehicle

Abstract

The utility model discloses a transmission shaft and a vehicle, and relates to the technical field of vehicles, the transmission shaft comprises: a transmission shaft tube, the inner surface of which is provided with a first fixing part; the transition piece is fixedly connected with the joint fork, a second fixing part is formed on the peripheral wall of the transition piece, the transmission shaft pipe is arranged on the transition piece in a sleeving mode, the first fixing part and the second fixing part are assembled in a matched mode so that the transmission shaft pipe and the transition piece can be fixed, the first fixing part is one of the fixing groove and the fixing protrusion, and the second fixing part is the other one of the fixing groove and the fixing protrusion. The first fixing part is formed on the inner surface of the transmission shaft pipe, the second fixing part is formed on the peripheral wall of the transition piece, and the first fixing part and the second fixing part are assembled in a matched mode, so that the transmission shaft pipe and the joint fork can be fixedly connected through the transition piece, and the torque transmission capacity between the transmission shaft pipe and the joint fork can be improved; the transmission shaft tube and the yoke do not need additional mechanical connection, so that the damage risk of the transmission shaft tube is reduced, and the working performance of the transmission shaft is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a transmission shaft and a vehicle with the transmission shaft. Background Art

[0002] In related technologies, the drive shaft tube and the yoke are usually connected by bonding or riveting, but the bonding connection cannot withstand large torque, and the use of mechanical connections such as rivets will damage the drive shaft tube and cannot maximize the performance of the drive shaft tube. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, one purpose of the present invention is to provide a transmission shaft that is conducive to improving the ability to transmit torque between the transmission shaft tube and the yoke, and can also improve the working performance of the transmission shaft.

[0004] The utility model further provides a vehicle.

[0005] According to an embodiment of the utility model, the transmission shaft includes: a transmission shaft tube, the inner surface of the transmission shaft tube is formed with a first fixing portion; a transition piece and a yoke, the transition piece and the yoke are arranged along the extension direction of the transmission shaft tube, and the transition piece and the yoke are fixedly connected, the transition piece is located on the side of the yoke facing the transmission shaft tube, the peripheral wall of the transition piece forms a second fixing portion, the transmission shaft tube is sleeved on the transition piece, the first fixing portion and the second fixing portion are matched and assembled to fix the transmission shaft tube and the transition piece, the first fixing portion is one of the fixing groove and the fixing protrusion, and the second fixing portion is the other of the fixing groove and the fixing protrusion.

[0006] According to the drive shaft of the embodiment of the present invention, a first fixing portion is formed on the inner surface of the drive shaft tube, and a second fixing portion is formed on the peripheral wall of the transition piece. The first fixing portion and the second fixing portion are assembled in coordination, so that the drive shaft tube and the yoke can be fixedly connected through the transition piece, which is beneficial to improving the ability to transmit torque between the drive shaft tube and the yoke. In addition, the drive shaft tube and the yoke do not require additional mechanical connection, which is beneficial to reducing the risk of damage to the drive shaft tube, thereby improving the working performance of the drive shaft.

[0007] In some embodiments of the present invention, the first fixing portion is the fixing groove, the second fixing portion is the fixing protrusion, and the drive shaft tube is connected to the transition piece by winding and curing.

[0008] In some embodiments of the present invention, there are multiple first fixing parts and multiple second fixing parts, and the multiple first fixing parts correspond to the multiple second fixing parts in a one-to-one manner.

[0009] In some embodiments of the present invention, multiple first fixing portions form multiple rows, multiple second fixing portions form multiple rows, and multiple rows of the first fixing portions and multiple rows of the second fixing portions are arranged along the extension direction of the transmission shaft tube.

[0010] In some embodiments of the present invention, along the extension direction of the transmission shaft tube, the spacing distance between any two adjacent rows of the first fixing parts is D, and the spacing distance between any two adjacent rows of the second fixing parts is D, satisfying the relationship: D=D.

[0011] In some embodiments of the present invention, each row of the first fixing parts includes a plurality of the first fixing parts, and the plurality of the first fixing parts in each row of the first fixing parts are arranged along the circumference of the transmission shaft tube; each row of the second fixing parts includes a plurality of the second fixing parts, and the plurality of the second fixing parts in each row of the second fixing parts are arranged along the circumference of the transmission shaft tube.

[0012] In some embodiments of the present invention, the first fixing portions of any two adjacent rows of the first fixing portions are staggered along the extension direction of the transmission shaft tube, and the second fixing portions of any two adjacent rows of the second fixing portions are staggered along the extension direction of the transmission shaft tube.

[0013] In some embodiments of the present invention, the transmission shaft tube is constructed as a carbon fiber tube.

[0014] In some embodiments of the present invention, there are two transition pieces and two yokes, and the two transition pieces and the two yokes are fixedly connected in a one-to-one correspondence. One transition piece and one yoke are arranged at one end of the transmission shaft tube, and the other transition piece and the other yoke are arranged at the other end of the transmission shaft tube.

[0015] The vehicle according to the present utility model includes the transmission shaft according to the above embodiment.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is an exploded view of a transmission shaft according to an embodiment of the present utility model;

[0019] Figure 2 It is a structural schematic diagram of a transition piece according to an embodiment of the present utility model.

[0020] Reference numerals:

[0021] Drive shaft 100;

[0022] Drive shaft tube 1;

[0023] Transition piece 2; second fixing portion 21; fixing protrusion 23;

[0024] Yoke 3; spline sleeve 4; spline shaft 5. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0026] Reference below Figure 1-Figure 2 The transmission shaft 100 according to an embodiment of the present invention is described. The transmission shaft 100 is installed between a gearbox and a drive axle of a vehicle to transmit torque.

[0027] like Figure 1 and Figure 2 As shown, the transmission shaft 100 according to the embodiment of the present invention includes: a transmission shaft tube 1, the inner surface of the transmission shaft tube 1 is formed with a first fixing portion; a transition piece 2 and a yoke 3, the transition piece 2 and the yoke 3 are arranged along the extension direction of the transmission shaft tube 1, and the transition piece 2 and the yoke 3 are fixedly connected, the transition piece 2 is located on the side of the yoke 3 facing the transmission shaft tube 1, the peripheral wall of the transition piece 2 forms a second fixing portion 21, the transmission shaft tube 1 is sleeved on the transition piece 2, the first fixing portion and the second fixing portion 21 are assembled to fix the transmission shaft tube 1 and the transition piece 2, the first fixing portion is one of the fixing groove and the fixing protrusion 23, and the second fixing portion 21 is the other of the fixing groove and the fixing protrusion 23.

[0028] In some embodiments of the present application, the drive shaft tube 1 can be constructed of carbon fiber material. The drive shaft tube 1 is formed with a first fixing portion (not shown in the figure), and the first fixing portion is formed on the inner surface of the drive shaft tube 1. In some embodiments of the present application, the first fixing portion can also be constructed as a groove. The transition piece 2 and the yoke 3 are arranged along the extension direction of the drive shaft tube 1, and the transition piece 2 and the yoke 3 are fixedly connected. For example, the transition piece 2 and the yoke 3 can be connected by, but not limited to, friction welding or clipping.

[0029] The transition piece 2 is located on the side of the yoke 3 facing the drive shaft tube 1, that is, the transition piece 2 is located between the drive shaft tube 1 and the yoke 3. The transition piece 2 is formed with a second fixing portion 21, and the second fixing portion 21 is formed on the peripheral wall of the transition piece 2. The second fixing portion 21 can increase the rigidity of the transition piece 2. As some embodiments of the present application, the second fixing portion 21 can be constructed as a boss. The inner wall size and shape of the drive shaft tube 1 are adapted to the peripheral wall size and shape of the transition piece 2. For example, the outer diameter of the transition piece 2 is slightly smaller than the inner diameter of the drive shaft tube 1, so that the drive shaft tube 1 is sleeved on the transition piece 2.

[0030] When the drive shaft tube 1 is sleeved on the transition piece 2, the first fixing part and the second fixing part 21 can be assembled in cooperation. For example, the first fixing part can be constructed as a fixing groove, and the second fixing part 21 can be constructed as a fixing protrusion 23, or the first fixing part can be constructed as a fixing protrusion 23, and the second fixing part 21 can be constructed as a fixing groove. By assembling the fixing protrusion 23 in the fixing groove, the first fixing part and the second fixing part 21 can be assembled in cooperation, so that the drive shaft tube 1 and the transition piece 2 are fixedly connected, which is beneficial to improving the ability to transmit torque between the drive shaft tube 1 and the yoke 3. In addition, the drive shaft tube 1 and the yoke 3 do not require additional mechanical connection, which is beneficial to reducing the risk of damage to the drive shaft tube 1, thereby improving the working performance of the drive shaft 100.

[0031] Specifically, the drive shaft tube 1 is constructed of carbon fiber material, which has the advantages of light weight, sufficient toughness, and impact resistance. By constructing the drive shaft tube 1 as a carbon fiber tube, it is beneficial to further improve the ability of the drive shaft 100 to transmit torque, and is also beneficial to the lightweight design of the drive shaft 100.

[0032] A second fixing portion 21 is formed on the peripheral wall of the transition piece 2, which is wound around the outside of the transition piece 2 by carbon fiber winding and the drive shaft tube 1 and the transition piece 2 are solidified and formed by curing. During the winding process, the first fixing portion is naturally formed so that the drive shaft tube 1 is sleeved on the transition piece 2, and the first fixing portion and the second fixing portion 21 are assembled in cooperation. Such an arrangement can make the drive shaft tube 1 fit tightly with the transition piece 2, and by providing the first fixing portion and the second fixing portion 21 instead of connecting structures such as rivets, the connection area between the drive shaft tube 1 and the transition piece 2 can be increased, which is beneficial to improving the bonding between the drive shaft tube 1 and the transition piece 2, thereby improving the ability of the drive shaft 100 to transmit torque.

[0033] Therefore, by forming a first fixing portion on the inner surface of the drive shaft tube 1 and forming a second fixing portion 21 on the peripheral wall of the transition piece 2, the first fixing portion and the second fixing portion 21 are assembled together, so that the drive shaft tube 1 and the yoke 3 can be fixedly connected through the transition piece 2, which is beneficial to improving the ability to transmit torque between the drive shaft tube 1 and the yoke 3. In addition, the drive shaft tube 1 and the yoke 3 do not require additional mechanical connection, which is beneficial to reducing the risk of damage to the drive shaft tube 1, thereby improving the working performance of the drive shaft 100.

[0034] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the first fixing portion is a fixing groove, the second fixing portion 21 is a fixing protrusion 23, and the transmission shaft tube 1 and the transition piece 2 are connected by winding and curing.

[0035] The winding and curing connection between the drive shaft tube 1 and the transition piece 2 allows the fixing groove and the fixing protrusion 23 to be fixedly assembled, thereby ensuring the coordinated assembly of the first fixing portion and the second fixing portion 21. This eliminates the need for mechanical connectors such as rivets between the drive shaft tube 1 and the transition piece 2. This improves the securement and reliability of the connection between the drive shaft tube 1 and the transition piece 2 without damaging the drive shaft tube 1, thereby optimizing the operating performance and service life of the drive shaft 100. Furthermore, reinforcing ribs are provided on the transition piece 2 to increase the connection area between the drive shaft tube 1 and the transition piece 2, further enhancing the bonding between the drive shaft tube 1 and the transition piece 2, effectively increasing the torque transmission capacity and service life of the drive shaft 100.

[0036] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, there are multiple first fixing portions and multiple second fixing portions 21 , and the multiple first fixing portions and the multiple second fixing portions 21 correspond one to one.

[0037] Among them, there are multiple first fixing parts and second fixing parts 21, for example: the first fixing parts and the second fixing parts 21 can be ten, twenty, thirty or more, and multiple first fixing parts and multiple second fixing parts 21 correspond one to one, that is, one first fixing part corresponds to one second fixing part 21. By setting multiple first fixing parts and multiple second fixing parts 21, and multiple first fixing parts and multiple second fixing parts 21 correspond one to one, when one pair of corresponding first fixing parts and second fixing parts 21 fails to be assembled, the other first fixing parts and second fixing parts 21 can continue to play a fixing role, reducing the risk of separation of the drive shaft tube 1 and the yoke 3 due to assembly failure of one of the first fixing parts and the corresponding second fixing part 21, which is beneficial to improving the assembly reliability between the drive shaft tube 1 and the yoke 3, thereby improving the ability to transmit torque between the drive shaft tube 1 and the yoke 3, and then improving the working performance of the drive shaft 100, and effectively extending the service life of the drive shaft 100.

[0038] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the plurality of first fixing portions form a plurality of rows, and the plurality of second fixing portions 21 form a plurality of rows, and the plurality of rows of first fixing portions and the plurality of rows of second fixing portions 21 are all arranged along the extension direction of the transmission shaft tube 1 .

[0039] The first fixing portions 21 are arranged in multiple rows, for example, two, three or more rows. The second fixing portions 21 are arranged in multiple rows, for example, two, three or more rows.

[0040] This application is explained by taking an example in which multiple first fixing parts form three rows and multiple second fixing parts 21 form three rows. The three rows of first fixing parts and the three rows of second fixing parts 21 are all arranged along the extension direction of the transmission shaft tube 1. Such an arrangement can make the arrangement of the first fixing parts and the second fixing parts 21 reasonable, and is conducive to the reliable fixing effect of the first fixing parts and the second fixing parts 21 along the extension direction of the transmission shaft tube 1. It can also reduce the risk of increased production costs due to excessive number of first fixing parts and second fixing parts 21, which is conducive to the low-cost design of the transmission shaft 100.

[0041] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, along the extension direction of the transmission shaft tube 1 , the spacing distance between any two adjacent rows of first fixing portions is D1 , and the spacing distance between any two adjacent rows of second fixing portions 21 is D2 , satisfying the relationship: D1 = D2 .

[0042] Among them, along the extension direction of the drive shaft tube 1, the spacing distance D1 between any two adjacent rows of first fixing parts and the spacing distance D2 between any two adjacent rows of second fixing parts 21 satisfy the relationship: D1=D2. Such a setting can make the spacing distance between any two adjacent rows of first fixing parts and the spacing distance between any two adjacent rows of second fixing parts 21 adapt to each other, which is conducive to the smooth assembly of multiple rows of first fixing parts and multiple rows of second fixing parts 21, so that the drive shaft tube 1 and the transition piece 2 can be smoothly assembled, reducing the risk of assembly failure of any row of first fixing parts and the corresponding second fixing parts 21, resulting in the drive shaft 100 being unable to be assembled or poor quality, thereby improving the quality of the drive shaft 100.

[0043] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, each row of first fixing portions includes multiple first fixing portions, and the multiple first fixing portions in each row of first fixing portions are arranged along the circumference of the transmission shaft tube 1; each row of second fixing portions 21 includes multiple second fixing portions 21, and the multiple second fixing portions 21 in each row of second fixing portions 21 are arranged along the circumference of the transmission shaft tube 1.

[0044] Each row of first fixing portions includes a plurality of first fixing portions, for example, each row of first fixing portions may include two first fixing portions, six first fixing portions, eight first fixing portions, or more first fixing portions, and the plurality of first fixing portions in each row of first fixing portions are arranged along the circumference of the drive shaft tube 1. Each row of second fixing portions 21 includes a plurality of second fixing portions 21, for example, each row of first fixing portions may include two second fixing portions 21, six second fixing portions 21, eight second fixing portions 21, or more second fixing portions 21, and the plurality of second fixing portions 21 in each row of second fixing portions 21 are arranged along the circumference of the drive shaft tube 1.

[0045] Such an arrangement can make the multiple first fixing parts of any row correspond one-to-one with the multiple second fixing parts 21 of the corresponding row, which is beneficial for the multiple first fixing parts of any row and the multiple second fixing parts 21 of the corresponding row to uniformly play a fixing role along the circumferential direction, thereby improving the uniformity of the circumferential force between the drive shaft tube 1 and the yoke 3, reducing the risk of deformation or even cracking of the drive shaft tube 1 or the yoke 3 due to uneven force, and thus extending the service life of the drive shaft 100.

[0046] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the first fixing portions of any two adjacent rows of first fixing portions are staggered along the extension direction of the transmission shaft tube 1 , and the second fixing portions 21 of any two adjacent rows of second fixing portions 21 are staggered along the extension direction of the transmission shaft tube 1 .

[0047] Among them, the first fixing parts of any two adjacent rows of first fixing parts are staggered along the extension direction of the transmission shaft tube 1. The staggered arrangement can make the first fixing parts more evenly arranged on the surface of the transmission shaft tube 1 facing the transition piece 2, and the second fixing parts 21 of any two adjacent rows of second fixing parts 21 are staggered along the extension direction of the transmission shaft tube 1, so that the arrangement mode of the second fixing parts 21 is consistent with the arrangement mode of the first fixing parts, so that any first fixing part has a corresponding second fixing part 21 to adapt to it, and, by staggering the first fixing parts of the first fixing parts and the second fixing parts 21 along the extension direction of the transmission shaft tube 1, multiple first fixing parts and corresponding multiple second fixing parts 21 can play a more uniform fixing role, thereby further improving the uniformity of the circumferential force between the transmission shaft tube 1 and the yoke 3, and can improve the connection strength between the transmission shaft tube 1 and the transition piece 2, which is beneficial to improving the connection quality of the transmission shaft tube 1 and the transition piece 2.

[0048] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the first fixing portion is a fixing groove, and the second fixing portion 21 is a fixing protrusion 23 .

[0049] Among them, the first fixing part can be constructed as a fixing groove, and the second fixing part 21 can be constructed as a fixing protrusion 23. Such an arrangement can make the structural design of the first fixing part and the second fixing part 21 reasonable, and facilitate the processing and forming of the second fixing part 21. It should be noted that the first fixing part is naturally formed during the winding process of the drive shaft tube 1, thereby reducing the processing difficulty of the drive shaft tube 1 and the transition piece 2, which is beneficial to improving the processing efficiency of the drive shaft tube 1 and the transition piece 2, and reducing the production cost of the drive shaft tube 1 and the transition piece 2. Moreover, by assembling through the fixing groove and the fixing protrusion 23, no additional mechanical connection is required between the drive shaft tube 1 and the yoke 3, which can reduce the risk of damage to the drive shaft tube 1, thereby improving the working performance and use reliability of the drive shaft 100.

[0050] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the driveshaft tube 1 is designed as a carbon fiber tube.

[0051] Among them, the drive shaft tube 1 can be constructed of carbon fiber material, which has the advantages of light weight, sufficient toughness, and impact resistance. By constructing the drive shaft tube 1 as a carbon fiber tube, the ability of the drive shaft tube 1 to transmit torque can be improved, and it is also beneficial to the lightweight design of the drive shaft 100, thereby improving the ability of the drive shaft 100 to transmit torque, which is beneficial to improving the working performance of the drive shaft 100, and thus extending the service life of the drive shaft 100.

[0052] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, there are two transition pieces 2 and two yokes 3, and the two transition pieces 2 and the two yokes 3 are fixedly connected in a one-to-one correspondence. One transition piece 2 and one yoke 3 are arranged at one end of the transmission shaft tube 1, and the other transition piece 2 and the other yoke 3 are arranged at the other end of the transmission shaft tube 1.

[0053] There can be two transition pieces 2 and two yokes 3, and the two transition pieces 2 and the two yokes 3 are fixedly connected in a one-to-one correspondence. That is, one transition piece 2 corresponds to one yoke 3. Along the extension direction of the transmission shaft tube 1, the transmission shaft tube 1 has two opposite ends. One transition piece 2 and one yoke 3 are provided at one end of the transmission shaft tube 1, and the transition piece 2 is provided between the transmission shaft tube 1 and the yoke 3. Another transition piece 2 and another yoke 3 are provided at the other end of the transmission shaft tube 1, and the transition piece 2 is also provided between the transmission shaft tube 1 and the yoke 3. That is, along the extension direction of the transmission shaft 100, two yokes 3 are respectively provided at both ends of the transmission shaft 100, so that the yoke 3 and components such as the drive axle are connected through universal joints, thereby realizing the smooth transmission of power from the transmission shaft 100 to the drive axle, thereby driving the wheels to rotate and achieving the effect of driving the vehicle.

[0054] In some examples, two transition pieces 2 can be provided, and the two transition pieces 2 are respectively provided at both ends of the drive shaft tube 1. As some embodiments of the present application, the two transition pieces 2 are fixed on a workbench, and carbon fiber winding is performed between the two transition pieces 2. For example, the carbon fiber can be wound from one of the transition pieces 2 toward the other transition piece 2, or the carbon fiber winding can be performed on the two transition pieces 2 at the same time, so that the drive shaft tube 1 is fixedly connected to both transition pieces 2.

[0055] A yoke 3 is provided at both ends of the transmission shaft tube 1, and a transition piece 2 is connected between the transmission shaft tube 1 and the yoke 3 at both ends, and a spline shaft 5 and a spline sleeve 4 are provided between one of the transition pieces 2 and the corresponding yoke 3. Specifically, the spline shaft 5 is provided on the side of the spline sleeve 4 away from the transmission shaft tube 1, and the spline shaft 5 and the spline sleeve 4 are assembled together, so that the transmission shaft 100 is assembled, which is beneficial to improving the ability of the transmission shaft 100 to transmit torque. In addition, the various components of the transmission shaft 100 do not need to be connected by mechanical connection methods such as rivets, which is beneficial to reducing the risk of damage to the transmission shaft 100, thereby improving the working performance and working reliability of the transmission shaft 100.

[0056] Furthermore, the outer peripheral wall of the transition piece 2 can be shot blasted to increase the surface roughness of the assembly surface of the transition piece 2, which is beneficial to further increase the assembly reliability of the drive shaft tube 1 and the transition piece 2, thereby further improving the working performance of the drive shaft 100 and extending the service life of the drive shaft 100.

[0057] According to the vehicle of the present invention, including the drive shaft 100 of the above-described embodiment, a first fixing portion is formed on the inner surface of the drive shaft tube 1, a second fixing portion 21 is formed on the peripheral wall of the transition piece 2, and the first fixing portion and the second fixing portion 21 are assembled in a coordinated manner, so that the drive shaft tube 1 and the yoke 3 can be fixedly connected via the transition piece 2, which is beneficial for improving the ability to transmit torque between the drive shaft tube 1 and the yoke 3. In addition, the drive shaft tube 1 and the yoke 3 do not require an additional mechanical connection, which is beneficial for reducing the risk of damage to the drive shaft tube 1, thereby improving the working performance of the drive shaft 100.

[0058] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A transmission shaft (100), characterized in that: include: A transmission shaft tube (1), wherein a first fixing portion is formed on the inner surface of the transmission shaft tube (1); A transition piece (2) and a yoke (3), wherein the transition piece (2) and the yoke (3) are arranged along the extension direction of the transmission shaft tube (1), and the transition piece (2) and the yoke (3) are fixedly connected, the transition piece (2) is located on the side of the yoke (3) facing the transmission shaft tube (1), the peripheral wall of the transition piece (2) forms a second fixing portion (21), the transmission shaft tube (1) is sleeved on the transition piece (2), the first fixing portion and the second fixing portion (21) are matched and assembled to fix the transmission shaft tube (1) and the transition piece (2), the first fixing portion is one of the fixing groove and the fixing protrusion (23), and the second fixing portion (21) is the other of the fixing groove and the fixing protrusion (23).

2. The transmission shaft (100) according to claim 1, characterized in that The first fixing portion is the fixing groove, the second fixing portion (21) is the fixing protrusion (23), and the transmission shaft tube (1) and the transition piece (2) are connected by winding and curing.

3. The transmission shaft (100) according to claim 2, characterized in that There are multiple first fixing parts and multiple second fixing parts (21), and the multiple first fixing parts and the multiple second fixing parts (21) correspond one to one.

4. The transmission shaft (100) according to claim 3, characterized in that A plurality of the first fixing portions form a plurality of rows, and a plurality of the second fixing portions (21) form a plurality of rows, and the plurality of rows of the first fixing portions and the plurality of rows of the second fixing portions (21) are arranged along the extension direction of the transmission shaft tube (1).

5. The transmission shaft (100) according to claim 4, characterized in that Along the extension direction of the transmission shaft tube (1), the spacing distance between any two adjacent rows of the first fixing parts is D1, and the spacing distance between any two adjacent rows of the second fixing parts (21) is D2, satisfying the relationship: D1=D2.

6. The transmission shaft (100) according to claim 4, characterized in that Each row of the first fixing parts includes a plurality of the first fixing parts, and the plurality of the first fixing parts in each row of the first fixing parts are arranged along the circumference of the transmission shaft tube (1); Each row of the second fixing portions (21) comprises a plurality of the second fixing portions (21), and the plurality of the second fixing portions (21) in each row of the second fixing portions (21) are arranged along the circumferential direction of the transmission shaft tube (1).

7. The transmission shaft (100) according to claim 4, characterized in that The first fixing portions of any two adjacent rows of the first fixing portions are staggered along the extension direction of the transmission shaft tube (1), and the second fixing portions (21) of any two adjacent rows of the second fixing portions (21) are staggered along the extension direction of the transmission shaft tube (1).

8. The transmission shaft (100) according to any one of claims 1 to 7, characterized in that: The transmission shaft tube (1) is constructed as a carbon fiber tube.

9. The transmission shaft (100) according to any one of claims 1 to 7, characterized in that: There are two transition pieces (2) and two yokes (3), and the two transition pieces (2) and the two yokes (3) are fixedly connected in a one-to-one correspondence. One transition piece (2) and one yoke (3) are arranged at one end of the transmission shaft tube (1), and the other transition piece (2) and the other yoke (3) are arranged at the other end of the transmission shaft tube (1).

10. A vehicle, characterized in that: The invention comprises a transmission shaft (100) according to any one of claims 1 to 9.

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