Steering transmission shaft, steering system and vehicle

Abstract

The steering transmission shaft comprises a shaft sleeve, a shaft rod and a spline assembly, a shaft sleeve groove extending in the axial direction of the shaft sleeve is formed in the shaft sleeve, one end of the shaft sleeve groove is closed, and an opening of the shaft sleeve groove is used for facing a cockpit of the vehicle; the shaft rod is movably installed in the shaft sleeve groove in the axial direction of the shaft sleeve. An air channel is formed between the shaft sleeve and the shaft rod, and the shaft sleeve groove is communicated with a cab of the vehicle through the air channel. The opening of the shaft sleeve groove faces the interior of the cab, and the air channel communicated with the shaft sleeve groove is arranged between the shaft sleeve and the shaft rod, that is, part of the shaft sleeve located outside the cab is not provided with a via hole communicated with the shaft sleeve groove, so that when an automobile passes through complex road conditions, accumulated water can be effectively prevented from entering the shaft sleeve groove to dilute lubricating grease in the steering transmission shaft; and meanwhile, the situation that particle impurities enter the shaft sleeve groove to cause clamping stagnation or abnormal sound of the steering transmission shaft can be avoided.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a steering transmission shaft, a steering system and a vehicle. Background Art

[0002] In the power steering device of the vehicle, a steering transmission shaft is provided to connect the steering column and the steering gear. The steering transmission shaft consists of a spline shaft and a telescopic tube. Since there is a sliding pair between the spline shaft and the telescopic tube, when the tube cavity of the telescopic tube is in a completely sealed state, the gas in the tube cavity of the telescopic tube cannot be discharged in time, thereby hindering the movement of the spline shaft.

[0003] In the related art, an exhaust hole of a certain size is designed in the telescopic tube or the universal joint connected to the telescopic tube. However, the setting of the exhaust hole makes it easy for the accumulated water to splash into the telescopic tube through the exhaust hole when the vehicle passes through a wet road surface, which will dilute the grease. When the vehicle passes through a muddy and sandy road surface, particulate impurities can easily enter the telescopic tube through the exhaust hole, which will affect the sliding movement of the spline shaft and the telescopic tube and easily cause jamming or abnormal noise. Utility Model Content

[0004] The embodiments of the present application provide a steering drive shaft, a steering system and a vehicle, which can prevent water accumulation and foreign particles from entering the tube cavity of the telescopic tube when the vehicle is on a water road surface or a muddy and sandy road surface, so as to at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above object, according to a first aspect of the present application, a steering transmission shaft is provided, comprising:

[0006] A shaft sleeve, wherein the shaft sleeve is provided with a shaft sleeve groove extending along the axial direction thereof, one end of the shaft sleeve groove is closed, and the opening of the shaft sleeve groove is used to face the driving cabin of the vehicle; and

[0007] The shaft rod is movably installed in the shaft sleeve groove along the axial direction of the shaft sleeve;

[0008] An air passage is formed between the shaft sleeve and the shaft rod, and the air passage connects the shaft sleeve groove with the cockpit of the vehicle.

[0009] Optionally, the steering transmission shaft further comprises a spline assembly, the spline assembly is arranged between the shaft sleeve and the shaft rod, and an air passage is formed on the spline assembly.

[0010] Optionally, the spline assembly includes an inner spline structure and an outer spline structure, the inner spline structure is arranged on the inner wall of the shaft sleeve groove, the outer spline structure is arranged on the outer periphery of the shaft rod, and the outer spline structure cooperates with the inner spline structure;

[0011] An air passage is formed on at least one of the inner spline structure and the outer spline structure.

[0012] Optionally, the internal spline structure includes a plurality of first spline teeth, which are arranged on the groove wall of the shaft sleeve groove along the circumferential direction of the shaft sleeve groove, and the internal spline structure also includes a plurality of first grooves, and the first groove is located between two adjacent first spline teeth; the external spline structure includes a plurality of second spline teeth, which are arranged on the side wall of the shaft rod along the circumferential direction of the shaft rod, and the external spline structure also includes a plurality of second grooves, and the second groove is located between two adjacent second spline teeth; the plurality of first spline teeth and the plurality of second spline teeth are meshed with each other through the plurality of first grooves and the plurality of second grooves;

[0013] The air passage is formed on the first spline teeth or on the second spline teeth or between the first spline teeth and the second spline teeth.

[0014] Optionally, the internal spline structure further comprises at least one third groove, the third groove is located between two adjacent first spline teeth, and the size of the third groove is larger than that of the first groove;

[0015] Wherein, at least one second spline tooth is arranged in the third groove, and the gap formed between the second spline tooth in the third groove and the side wall of the third groove constitutes an air passage.

[0016] Optionally, the external spline structure further comprises at least one fourth groove, the fourth groove is located between two adjacent second spline teeth, and the size of the fourth groove is larger than the size of the second groove;

[0017] Wherein, at least one first spline tooth is arranged in the fourth groove, and the gap formed between the first spline tooth in the fourth groove and the side wall of the fourth groove constitutes an air passage.

[0018] Optionally, the internal spline structure further comprises at least one third groove, the third groove is located between two adjacent first spline teeth, and the size of the third groove is larger than that of the first groove;

[0019] The external spline structure further comprises at least one fourth groove, the fourth groove is located between two adjacent second spline teeth, and the size of the fourth groove is larger than the size of the second groove;

[0020] The third groove and the fourth groove are opposite or staggered in the radial direction of the sleeve to form an air passage.

[0021] Optionally, at least one of the first spline teeth and the second spline teeth is provided with a through hole, and the through hole forms an air passage.

[0022] Optionally, the air passage is recessed on at least one of the first spline teeth and the second spline teeth.

[0023] Optionally, the steering transmission shaft further comprises a sleeve, which is mounted on the sleeve and disposed at an opening position of the sleeve groove, and the sleeve comprises a stopper, at least a portion of which abuts against the shaft rod or the external spline structure in the axial direction of the sleeve.

[0024] Optionally, the number of airways is set to be plural.

[0025] According to a second aspect of the present application, a steering system is provided, comprising:

[0026] Such as the steering drive shaft mentioned above;

[0027] A steering gear connected to the bushing on the steering shaft; and

[0028] The steering column is connected to the shaft rod on the steering transmission shaft.

[0029] According to a third aspect of the present application, a vehicle is provided, comprising the steering system as described above.

[0030] In the steering drive shaft of the embodiment of the present application, the opening of the sleeve groove is arranged to face the cockpit, and the air duct connected to the sleeve groove is arranged between the sleeve and the shaft, that is, the part of the sleeve located outside the cockpit does not have a through hole connected to the sleeve groove. When the car passes through complex road conditions, it can effectively prevent accumulated water from entering the sleeve groove to dilute the grease in the steering drive shaft. At the same time, it can also prevent particulate impurities from entering the sleeve groove to cause the steering drive shaft to become stuck or make abnormal noises.

[0031] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0033] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0034] Figure 1 is a schematic diagram of the overall structure of a steering transmission shaft provided in an exemplary embodiment of the present application;

[0035] Figure 2 is a schematic cross-sectional structural diagram of a steering transmission shaft provided in an exemplary embodiment of the present application;

[0036] Figure 3is a schematic diagram of the assembly of a shaft sleeve and a shaft rod provided in an exemplary embodiment of the present application;

[0037] Figure 4 is a schematic diagram of the assembly of a shaft sleeve and a shaft rod provided in an exemplary embodiment of the present application;

[0038] Figure 5 is a schematic diagram of the assembly of a shaft sleeve and a shaft rod provided in an exemplary embodiment of the present application;

[0039] Figure 6 is a schematic diagram of the assembly of a shaft sleeve and a shaft rod provided in an exemplary embodiment of the present application;

[0040] Figure 7 is a schematic diagram of the assembly of a shaft sleeve and a shaft rod provided in an exemplary embodiment of the present application;

[0041] Figure 8 is a schematic diagram of the assembly of a shaft sleeve and a shaft rod provided in an exemplary embodiment of the present application;

[0042] Fig. 9 is a schematic diagram of the assembly of a shaft sleeve and a shaft rod provided in an exemplary embodiment of the present application;

[0043] Fig.10 yes Figure 2 A magnified schematic diagram of part A;

[0044] Fig.11 is a schematic diagram of the overall structure of a steering transmission shaft provided in an exemplary embodiment of the present application;

[0045] Fig.12 yes Fig.11 Schematic diagram of the enlarged portion B.

[0046] Description of reference numerals:

[0047] 1. Bushing; 2. Bushing groove; 3. Spline assembly; 31. Internal spline structure; 311. First spline tooth; 312. First groove; 313. Third groove; 32. External spline structure; 321. Second spline tooth; 322. Second groove; 323. Fourth groove; 4. Through hole; 5. Sleeve; 51. Stopper; 6. Universal joint; 7. Dust cover; 8. Support frame; 9. Shaft rod; 10. Airway. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0049] The present application proposes a steering transmission shaft. Figures 1 to 12 These are some embodiments of the present application.

[0050] See also Figures 1 to 3 In some embodiments of the present application, the steering transmission shaft includes a sleeve 1 and a shaft rod 9, the end of the sleeve 1 without the sleeve groove 2 faces the space outside the cockpit and is connected to the steering gear, the end of the sleeve 1 with the sleeve groove 2 faces the inside of the cockpit, and the shaft rod 9 is movably installed in the sleeve groove 2 along the axial direction of the sleeve 1 and is connected to the steering column.

[0051] Among them, the relative sliding setting of the sleeve 1 and the shaft rod 9 can play a shock-absorbing role to reduce the reaction force of the road surface transmitted to the driver through the steering wheel; at the same time, when the vehicle collides, the sleeve 1 and the shaft rod 9 can shrink relatively to absorb the collision energy to prevent components such as the steering drive shaft from colliding with the driver.

[0052] It should be supplemented that the shaft sleeve 1 and the shaft rod 9 are non-rotatably matched so that the steering transmission shaft can have a transmission function.

[0053] In the technical solution of the present application, the opening of the sleeve groove 2 is arranged to face the cockpit, and the air duct 10 connected to the sleeve groove 2 is arranged between the sleeve 1 and the shaft 9, that is, the part of the sleeve 1 located outside the cockpit does not have a through hole connected to the sleeve groove 2. When the car passes through complex road conditions, it can effectively prevent accumulated water from entering the sleeve groove 2 to dilute the grease in the steering drive shaft. At the same time, it can also prevent particulate impurities from entering the sleeve groove 2 to cause the steering drive shaft to become stuck or make abnormal noises.

[0054] In some embodiments of the present application, the steering transmission shaft also includes a spline assembly 3, which is arranged between the sleeve 1 and the shaft rod 9 to limit the relative rotation between the sleeve 1 and the shaft rod 9, so that the steering transmission shaft has a transmission function; an air duct 10 is formed on the spline assembly 3, and the air duct 10 connects the sleeve groove 2 with the cockpit of the vehicle. The setting of the air duct 10 can make the sleeve groove 2 not in a completely sealed environment, and will not affect the axial movement of the shaft rod 9 in the sleeve 1.

[0055] Among them, by setting the opening of the sleeve groove 2 toward the cockpit, and setting the air duct 10 connected to the sleeve groove 2 on the spline assembly 3, that is, the part of the sleeve 1 located outside the cockpit does not have a through hole connected to the sleeve groove 2, when the car passes through complex road conditions, it can effectively prevent accumulated water from entering the sleeve groove 2 to dilute the grease in the steering drive shaft. At the same time, it can also prevent particulate impurities from entering the sleeve groove 2 to cause the steering drive shaft to become stuck or make abnormal noises.

[0056] In some embodiments of the present application, the spline assembly 3 includes an internal spline structure 31 and an external spline structure 32. The internal spline structure 31 is arranged on the inner wall of the sleeve groove 2, and the external spline structure 32 is arranged on the outer periphery of the shaft rod 9. The external spline structure 32 cooperates with the internal spline structure 31 to limit the relative rotation of the sleeve 1 and the shaft rod 9.

[0057] In which, an air duct 10 is formed on at least one of the inner spline structure 31 and the outer spline structure 32; in one embodiment, the air duct 10 is formed on the inner spline structure 31; in another embodiment, the air duct 10 is formed on the outer spline structure 32; in yet another embodiment, the air duct 10 is formed on both the inner spline structure 31 and the outer spline structure 32.

[0058] In some embodiments of the present application, the internal spline structure 31 includes a plurality of first spline teeth 311 , which are arranged on the groove wall of the shaft sleeve groove 2 along the circumference of the shaft sleeve groove 2 , and the internal spline structure 31 also includes a plurality of first grooves 312 , which are located between two adjacent first spline teeth 311 .

[0059] The external spline structure 32 includes a plurality of second spline teeth 321, which are arranged on the side wall of the shaft 9 along the circumference of the shaft 9. The external spline structure 32 also includes a plurality of second grooves 322, and the second groove 322 is located between two adjacent second spline teeth 321; wherein the first spline tooth 311 is embedded in the second groove 322, and the second spline tooth 321 is embedded in the first groove 312, thereby realizing the meshing of the plurality of first spline teeth 311 and the plurality of second spline teeth 321.

[0060] In one embodiment, the air passage 10 is formed on the first spline teeth 311 ; in another embodiment, the air passage 10 is formed on the second spline teeth 321 ; in yet another embodiment, the air passage 10 is formed between the first spline teeth 311 and the second spline teeth 321 .

[0061] In some embodiments of the present application, the internal spline structure 31 further includes at least one third groove 313 . The third groove 313 is located between two adjacent first spline teeth 311 . The size of the third groove 313 is greater than that of the first groove 312 .

[0062] In one embodiment, the third groove 313 may be formed by removing one or more of the first spline teeth 311 from the plurality of first spline teeth 311, so the size of the third groove 313 is larger than the size of the first groove 312; in another embodiment, the groove depth of the third groove 313 may be greater than the groove depth of the first groove 312, so the size of the third groove 313 is larger than the size of the first groove 312; wherein at least one second spline tooth 321 is arranged in the third groove 313, and the gap formed between the second spline tooth 321 located in the third groove 313 and the side wall of the third groove 313 constitutes the airway 10.

[0063] That is, in this embodiment, the air duct 10 formed on the inner spline structure 31 connects the shaft sleeve groove 2 with the space inside the cockpit. When the car passes through complex road conditions, it can effectively prevent accumulated water from entering the shaft sleeve groove 2 to dilute the grease in the steering drive shaft. At the same time, it can also prevent particulate impurities from entering the shaft sleeve groove 2 to cause the steering drive shaft to become stuck or make abnormal noises.

[0064] It can be understood that the third groove 313 is formed by spacing two adjacent first spline teeth 311 , and when the second spline tooth 321 is located in the third groove 313 , the air passage 10 is formed between the first spline tooth 311 and the second spline tooth 321 .

[0065] In addition, when two or more second spline teeth 321 are disposed in the third groove 313 , a partial spacing area exists between the circumferential side of the second spline teeth 321 and the groove wall of the third groove 313 , and the partial spacing area constitutes the air passage 10 .

[0066] See also Figure 3 In some embodiments of the present application, the third groove 313 is formed by removing one first spline tooth 311 from the plurality of first spline teeth 311 .

[0067] In some embodiments of the present application, the external spline structure 32 further includes at least one fourth groove 323 . The fourth groove 323 is located between two adjacent second spline teeth 321 . The size of the fourth groove 323 is greater than that of the second groove 322 .

[0068] In one embodiment, the fourth groove 323 may be formed by removing one or more of the second spline teeth 321 from the plurality of second spline teeth 321, so the size of the fourth groove 323 is larger than the size of the second groove 322; in another embodiment, the groove depth of the fourth groove 323 may be greater than the groove depth of the second groove 322, so the size of the fourth groove 323 is larger than the size of the second groove 322; wherein at least one first spline tooth 311 is arranged in the fourth groove 323, and the gap formed between the first spline tooth 311 located in the fourth groove 323 and the side wall of the fourth groove 323 constitutes the airway 10.

[0069] That is, in this embodiment, the air duct 10 formed on the external spline structure 32 connects the shaft sleeve groove 2 with the space inside the cockpit. When the car passes through complex road conditions, it can effectively prevent accumulated water from entering the shaft sleeve groove 2 to dilute the grease in the steering drive shaft. At the same time, it can also prevent particulate impurities from entering the shaft sleeve groove 2 to cause the steering drive shaft to become stuck or make abnormal noises.

[0070] It can be understood that the fourth groove 323 is formed by two adjacent second spline teeth 321 , and when the first spline tooth 311 is located in the fourth groove 323 , the air passage 10 is formed between the first spline tooth 311 and the second spline tooth 321 .

[0071] In addition, when two or more first spline teeth 311 are disposed in the fourth groove 323 , a partial spacing area exists between the circumferential side of the first spline teeth 311 and the groove wall of the fourth groove 323 , and the partial spacing area constitutes the air passage 10 .

[0072] See also Figure 4 In some embodiments of the present application, the fourth groove 323 is formed by removing one second spline tooth 321 between the plurality of second spline teeth 321 .

[0073] In some embodiments of the present application, the internal spline structure 31 also includes at least one third groove 313, which is located between two adjacent first spline teeth 311, and the size of the third groove 313 is larger than the size of the first groove 312; the external spline structure 32 also includes at least one fourth groove 323, which is located between two adjacent second spline teeth 321, and the size of the fourth groove 323 is larger than the size of the second groove 322.

[0074] In one embodiment, the third groove 313 may be formed by removing one or more of the first spline teeth 311 from the plurality of first spline teeth 311, so the size of the third groove 313 is larger than the size of the first groove 312; in another embodiment, the groove depth of the third groove 313 may be greater than the groove depth of the first groove 312, so the size of the third groove 313 is larger than the size of the first groove 312. In one embodiment, the fourth groove 323 may be formed by removing one or more of the second spline teeth 321 from the plurality of second spline teeth 321, so the size of the fourth groove 323 is larger than the size of the second groove 322; in another embodiment, the groove depth of the fourth groove 323 may be greater than the groove depth of the second groove 322, so the size of the fourth groove 323 is larger than the size of the second groove 322.

[0075] See also Figure 5In some embodiments of the present application, the third groove 313 and the fourth groove 323 are arranged opposite to each other, so the third groove 313 and the fourth groove 323 are connected to each other to form an air channel 10; that is, in this embodiment, the air channel 10 formed on the inner spline structure 31 and the outer spline structure 32 connects the shaft sleeve groove 2 with the space in the cockpit. When the car passes through complex road conditions, it can effectively prevent accumulated water from entering the shaft sleeve groove 2 to dilute the grease in the steering drive shaft. At the same time, it can also prevent particulate impurities from entering the shaft sleeve groove 2 to cause the steering drive shaft to become stuck or make abnormal noises.

[0076] See also Figure 6 In some embodiments of the present application, the third groove 313 and the fourth groove 323 are staggered, that is, the gap formed between the groove wall of the third groove 313 and the second spline tooth 321 located in the third groove 313 constitutes the air channel 10, and the gap formed between the groove wall of the fourth groove 323 and the first spline tooth 311 located in the fourth groove 323 constitutes the air channel 10; that is, in this embodiment, the air channel 10 formed on the inner spline structure 31 and the outer spline structure 32 connects the shaft sleeve groove 2 with the space in the cockpit. When the car passes through complex road conditions, it can effectively prevent accumulated water from entering the shaft sleeve groove 2 to dilute the grease in the steering drive shaft. At the same time, it can also prevent particulate impurities from entering the shaft sleeve groove 2 to cause the steering drive shaft to become stuck or make abnormal noises.

[0077] See also Figure 7 In some embodiments of the present application, a through hole 4 is provided on at least one of the first spline tooth 311 and the second spline tooth 321, and the through hole 4 forms an air passage 10; in one embodiment, the through hole 4 may be provided only on the first spline tooth 311; in another embodiment, the through hole 4 may be provided only on the second spline tooth 321; in yet another embodiment, a through hole 4 is provided on both the first spline tooth 311 and the second spline tooth 321; the through hole 4 is provided to form an air passage 10 connecting the shaft sleeve groove 2 and the space in the cockpit, so that when the car passes through complex road conditions, it can effectively prevent accumulated water from entering the shaft sleeve groove 2 to dilute the grease in the steering drive shaft, and at the same time, it can also prevent particulate impurities from entering the shaft sleeve groove 2 to cause the steering drive shaft to become stuck or make abnormal noises.

[0078] See also Figure 8In some embodiments of the present application, the air duct 10 is recessed on at least one of the first spline teeth 311 and the second spline teeth 321; wherein, the air duct 10 can be recessed at any position on the first spline teeth 311 and the second spline teeth 321, ensuring that after the plurality of first spline teeth 311 and the plurality of second spline teeth 321 are meshed with each other, an air duct 10 is formed between the plurality of first spline teeth 311 and the plurality of second spline teeth 321; by recessing the air duct 10 connecting the shaft sleeve groove 2 and the space in the cockpit on the first spline teeth 311 and the second spline teeth 321, when the car passes through complex road conditions, it can effectively prevent accumulated water from entering the shaft sleeve groove 2 to dilute the grease in the steering drive shaft, and at the same time, it can also prevent particulate impurities from entering the shaft sleeve groove 2 to cause the steering drive shaft to become stuck or make abnormal noises.

[0079] See also Fig. 9 In some embodiments of the present application, the number of the air passages 10 is set to be multiple, and the provision of multiple air passages 10 ensures that the gas in the shaft sleeve groove 2 can be discharged normally.

[0080] In some embodiments of the present application, multiple air ducts 10 are arranged in an axial array on the sleeve 1, that is, the number of air ducts 10 can be an odd number or an even number. When the multiple air ducts 10 are located in the spline assembly 3, it is sufficient to ensure that the spacing between two adjacent air ducts 10 is equal. This arrangement ensures that the force between the multiple first spline teeth 311 and the multiple second spline teeth 321 is uniform.

[0081] See also Figures 10 to 12 In some embodiments of the present application, the steering transmission shaft also includes a sleeve 5, which is mounted on the sleeve 1 and arranged at the opening position of the sleeve groove 2. The sleeve 5 includes a stopper 51, and at least a portion of the stopper 51 abuts against the shaft rod 9 or the spline assembly 3 in the axial direction of the sleeve 1; that is, in this embodiment, when the shaft rod 9 extends into the sleeve groove 2 and the inner spline structure 31 and the outer spline structure 32 cooperate with each other, the sleeve 5 is installed at the opening position of the sleeve groove 2, and the stopper 51 on the sleeve 5 abuts against the second spline teeth 321 in the outer spline structure 32 or abuts against part of the shaft rod 9, thereby limiting the shaft rod 9 from coming out of the sleeve groove 2.

[0082] In some embodiments of the present application, the steering drive shaft also includes a universal joint 6 arranged on the bushing 1 and the shaft rod 9, the bushing 1 is connected to the steering gear through the universal joint 6, and the shaft rod 9 is connected to the steering column through the universal joint 6. The specific types of the two universal joints 6 located on the shaft rod 9 and the bushing 1 can be the same or different; wherein the universal joint 6 can be a cross-axis rigid universal joint 6, a three-axis universal joint 6, a ball fork universal joint 6 or a ball cage universal joint 6, etc.

[0083] In one embodiment of the present application, both universal joints 6 are cross-axis rigid universal joints 6 .

[0084] In some embodiments of the present application, the steering transmission shaft further includes a dust cover 7, which is disposed on the outer periphery of the shaft sleeve 1 to limit the entry of accumulated water, particulate impurities, etc. from outside the cockpit into the cockpit.

[0085] In some embodiments of the present application, the steering transmission shaft further includes a support frame 8, which is installed on the outer periphery of the bushing 1 to support the bushing 1 on the vehicle; in one embodiment of the present application, the support frame 8 is a bearing support frame.

[0086] The present application also proposes a steering system, which includes a steering drive shaft, a steering gear and a steering column, the steering gear is connected to a bushing 1 on the steering drive shaft, and the steering column is connected to a shaft rod 9 on the steering drive shaft; the steering drive shaft is as described above, and since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it at least has the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0087] The present application also proposes a vehicle, which includes a steering system. The steering system is as described above. Since the vehicle adopts all the technical solutions of all the above embodiments, it at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0088] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc., and this application does not make any specific limitation on this.

[0089] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0090] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0091] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0092] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A steering transmission shaft, characterized in that: include: A shaft sleeve, wherein the shaft sleeve is provided with a shaft sleeve groove extending along its axial direction, one end of the shaft sleeve groove is closed, and the opening of the shaft sleeve groove is used to face the driving cabin of the vehicle; and A shaft rod is movably installed in the shaft sleeve groove along the axial direction of the shaft sleeve; Wherein, an air passage is formed between the shaft sleeve and the shaft rod, and the air passage connects the shaft sleeve groove with the cockpit of the vehicle.

2. The steering transmission shaft according to claim 1, characterized in that: The steering transmission shaft further comprises a spline assembly, wherein the spline assembly is arranged between the shaft sleeve and the shaft rod, and the air passage is formed on the spline assembly.

3. The steering transmission shaft according to claim 2, characterized in that: The spline assembly comprises an inner spline structure and an outer spline structure, wherein the inner spline structure is arranged on the inner wall of the shaft sleeve groove, and the outer spline structure is arranged on the outer periphery of the shaft rod, and the outer spline structure cooperates with the inner spline structure; Wherein, the air passage is formed on at least one of the inner spline structure and the outer spline structure.

4. The steering transmission shaft according to claim 3, characterized in that: The internal spline structure comprises a plurality of first spline teeth, which are arranged on the groove wall of the shaft sleeve groove along the circumferential direction of the shaft sleeve groove, and the internal spline structure also comprises a plurality of first grooves, which are located between two adjacent first spline teeth; the external spline structure comprises a plurality of second spline teeth, which are arranged on the side wall of the shaft rod along the circumferential direction of the shaft rod, and the external spline structure also comprises a plurality of second grooves, which are located between two adjacent second spline teeth; the plurality of first spline teeth and the plurality of second spline teeth are meshed with each other through the plurality of first grooves and the plurality of second grooves; The air passage is formed on the first spline teeth or on the second spline teeth or between the first spline teeth and the second spline teeth.

5. The steering transmission shaft according to claim 4, characterized in that: The internal spline structure further comprises at least one third groove, wherein the third groove is located between two adjacent first spline teeth, and the size of the third groove is larger than the size of the first groove; Wherein, at least one of the second spline teeth is arranged in the third groove, and the gap formed between the second spline tooth in the third groove and the side wall of the third groove constitutes the air passage.

6. The steering transmission shaft according to claim 4, characterized in that: The external spline structure further comprises at least one fourth groove, the fourth groove is located between two adjacent second spline teeth, and the size of the fourth groove is larger than the size of the second groove; Wherein, at least one of the first spline teeth is arranged in the fourth groove, and the gap formed between the first spline tooth in the fourth groove and the side wall of the fourth groove constitutes the air passage.

7. The steering transmission shaft according to claim 4, characterized in that: The internal spline structure further comprises at least one third groove, wherein the third groove is located between two adjacent first spline teeth, and the size of the third groove is larger than the size of the first groove; The external spline structure further comprises at least one fourth groove, the fourth groove is located between two adjacent second spline teeth, and the size of the fourth groove is larger than the size of the second groove; The third groove and the fourth groove are opposite or staggered in the radial direction of the sleeve to form the air passage.

8. The steering transmission shaft according to claim 4, characterized in that: At least one of the first spline teeth and the second spline teeth is provided with a through hole, and the through hole forms the air passage.

9. The steering transmission shaft according to claim 4, characterized in that: The air passage is recessed on at least one of the first spline teeth and the second spline teeth.

10. The steering transmission shaft according to claim 3, characterized in that: The steering transmission shaft also includes a sleeve, which is mounted on the sleeve and arranged at the opening position of the sleeve groove. The sleeve includes a stopper, at least part of which abuts against the shaft rod or the external spline structure in the axial direction of the sleeve.

11. The steering transmission shaft according to any one of claims 1 to 10, characterized in that: The number of the airways is set to be multiple.

12. A steering system, characterized in that: include: The steering transmission shaft according to any one of claims 1 to 11; A steering gear connected to the shaft sleeve on the steering transmission shaft; and A steering column is connected to the shaft rod on the steering transmission shaft.

13. A vehicle, characterized in that: Comprising the steering system of claim 12.

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