CN209650039U - Vehicle and its drive shaft assembly - Google Patents

Abstract

The utility model discloses a transmission shaft assembly, which comprises an input driving yoke connected with a power assembly and an output driven yoke connected with a driving bridge, and the power transmission direction between the input driving yoke and the output driven yoke is The input driven yoke and the output driving yoke are connected in sequence, the tail end of the input driven yoke is set outside the head end of the output driving yoke, and several outer guide grooves are arranged on the inner wall of the tail end of the input driven yoke. The outer guide groove is not parallel to the radial section of the input driven yoke, and the outer wall of the head end of the output driving yoke is provided with a number of inner guide grooves corresponding to the outer guide grooves one by one and aligned in parallel. Rolling elements are movably embedded between the corresponding inner guide grooves. The transmission shaft assembly is not prone to jitter, abnormal noise and local overheating, and can effectively ensure transmission efficiency, driving stability and comfort of the vehicle. The utility model also discloses a vehicle using the transmission shaft assembly.

Description

Vehicle and its drive shaft assembly

technical field

The utility model relates to the technical field of supporting components of a vehicle transmission system, in particular to a transmission shaft assembly. The utility model also relates to a vehicle using the transmission shaft assembly.

Background technique

The transmission shaft is an important transmission component connecting the powertrain and the drive axle. The powertrain is elastically supported on the body or frame through the suspension system, and the powertrain will be displaced and rotated during the operation of the car; the drive axle is connected to the body or frame by the suspension system, and the car runs During the process, the suspension will move, so that the drive axle has a certain position relative to the body or frame. The powertrain and drive axle have displacement relative to the mounting carrier frame or body, which requires the transmission shaft to have telescopic characteristics to compensate for the relative position change between the powertrain and drive axle.

The current transmission shaft relies on the spline structure on the shaft to compensate the relative displacement between the powertrain and the drive axle, that is, the transmission is adjusted through the relative sliding between the surfaces of the spline teeth along the axial direction of the transmission shaft. The effective length of the shaft is used to compensate the relative displacement between the powertrain and the drive axle. The extrusion stress on the tooth side of the spline is very high when the torque is transmitted. At this time, the tooth side of the spline relies on relative sliding to adjust the length. Phenomena such as jitter, abnormal noise and local structure overheating not only seriously affect the NVH performance and driving comfort of the whole vehicle, but also reduce the The transmission efficiency of the transmission shaft affects the safety and stability of the vehicle.

Therefore, how to avoid vibration, abnormal noise and local overheating of the transmission shaft, and ensure its transmission efficiency and corresponding vehicle performance is an important technical problem that those skilled in the art need to solve at present.

Utility model content

The purpose of the utility model is to provide a transmission shaft assembly, which is not easy to shake and abnormal noise, can significantly improve the NVH performance of the whole vehicle, and at the same time, the transmission shaft assembly is not easy to cause local overheating of components, and can effectively ensure the transmission Efficiency, vehicle stability and comfort. Another object of the present utility model is to provide a vehicle using the above drive shaft assembly.

In order to solve the above technical problems, the utility model provides a transmission shaft assembly, which includes an input driving yoke connected to the power assembly and an output driven yoke connected to the drive axle, the input driving yoke is connected to the output According to the direction of power transmission, the driven forks are sequentially connected with an input driven fork and an output driving fork. The tail end of the input driven fork is sleeved outside the head end of the output driving fork. The inner wall of the tail end of the moving yoke is provided with several outer guide grooves, the outer guide grooves are not parallel to the radial section of the input driven yoke, and the outer wall of the head end of the output driving yoke is provided with a number of The outer guide grooves are one-to-one corresponding and parallel to the matched inner guide grooves, and rolling elements are movably embedded between the outer guide grooves and their corresponding inner guide grooves.

Preferably, a cage cooperating with each of the rolling elements is provided between the inner wall of the tail end of the input driven yoke and the outer wall of the head end of the output driving yoke.

Preferably, the cage is in interference fit with each of the rolling elements, and the cage is in clearance fit with the inner wall of the tail end of the input driven yoke and the outer wall of the head end of the output driving yoke.

Preferably, two adjacent outer guide grooves cooperate with each other to form a V-shaped oblique outer groove group, and two adjacent inner guide grooves cooperate with corresponding outer guide grooves to form a V-shaped oblique inner groove group.

Preferably, a rubber sheath is set on the outer periphery where the rear end of the input driven yoke matches the head end of the output driving yoke.

Preferably, both ends of the rubber sheath are interference fitted with clips.

Preferably, a cross shaft assembly is provided between the input driving yoke and the input driven yoke, and between the output driving yoke and the output driven yoke.

Preferably, an elastic supporting member is provided near the tail end of the input driven yoke in the middle.

Preferably, the rolling elements are steel balls.

The utility model also provides a vehicle, including a vehicle body, a power assembly and a drive axle are arranged inside the vehicle body, a transmission shaft assembly is connected between the power assembly and the drive axle, and the transmission shaft assembly is The propeller shaft assembly as described in any one of the above.

With respect to the above-mentioned background technology, in the drive shaft assembly provided by the utility model, during its assembly operation, when the relative displacement between the power assembly and the drive axle occurs during the running of the vehicle, the axis of the input driven yoke and the output drive shaft Deflection occurs between the axes of the yoke. At this time, the rolling element rolls to an appropriate position along the channel formed by the alignment and fastening of the inner guide groove and the outer guide groove, so that the relative position between the input driven yoke and the output driving yoke is deflected and Extension, so as to realize the deflection and extension of the overall structure of the transmission shaft assembly, and then adapt the corresponding displacement between the power assembly and the drive axle. The above-mentioned action process is mainly realized by the rolling operation of the rolling parts. There is no stress concentration in the sliding fit, thereby effectively avoiding the noise and structural vibration generated during the sliding fit process, and effectively avoiding the local overheating of related components caused by frequent friction during the sliding fit, so that the drive shaft assembly The transmission efficiency and the NVH performance of the whole vehicle are improved accordingly, and the driving process of the whole vehicle is more stable and comfortable.

In another preferred solution of the present invention, a cage cooperating with each of the rolling elements is provided between the inner wall of the tail end of the input driven yoke and the outer wall of the head end of the output driving yoke. The cage can ensure the coordinated linkage of each rolling element, thereby further improving the relative motion efficiency and structural reliability between the input driven yoke and the output driving yoke, and making the overall deflection and extension of the drive shaft assembly more efficient and consistency are improved accordingly.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of the cooperation structure between the transmission shaft assembly provided by a specific embodiment of the present invention, the power assembly and the drive axle;

Fig. 2 is the structural representation of drive shaft assembly in Fig. 1;

Fig. 3 is a structural sectional view of the input driven yoke in Fig. 2;

FIG. 4 is a schematic structural diagram of the output active fork in FIG. 2 .

Among them, 11-input driving fork, 12-input driven fork, 121-outer guide groove, 13-output driving fork, 131-inner guide groove, 14-output driven fork, 15-rolling parts, 151 -cage, 16-rubber sheath, 161-clamp, 17-cross shaft assembly, 18-elastic support, 21-powertrain, 22-drive axle.

Detailed ways

The core of the utility model is to provide a transmission shaft assembly, which has high structural strength and structural rigidity; at the same time, it provides a vehicle using the above transmission shaft assembly.

In order to enable those skilled in the art to better understand the solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to Figures 1 to 4, Figure 1 is a schematic diagram of the cooperation structure between the transmission shaft assembly provided by a specific embodiment of the present invention, the power assembly and the drive axle; Figure 2 is the schematic diagram of the transmission shaft assembly in Figure 1 Schematic diagram of the structure; Fig. 3 is a structural sectional view of the input driven yoke in Fig. 2; Fig. 4 is a schematic structural diagram of the output driving yoke in Fig. 2 .

In a specific embodiment, the transmission shaft assembly provided by the utility model includes the input driving yoke 11 connected with the power assembly 21 and the output driven yoke 14 connected with the drive axle 22, the input driving yoke 11 and the The output driven yokes 14 are sequentially connected with the input driven yoke 12 and the output driving yoke 13 according to the direction of power transmission. The inner wall of the tail end of the movable yoke 12 is provided with several outer guide grooves 121, the outer guide grooves 121 are not parallel to the radial section of the input driven yoke 12, and the outer wall of the head end of the output driving yoke 13 is provided with a number of outer guide grooves 121 that are in line with the outer guide grooves. The guide grooves 121 correspond one-to-one and parallel to the matched inner guide grooves 131 , and the rolling elements 15 are movably embedded between the outer guide grooves 121 and the corresponding inner guide grooves 131 .

During the assembly operation, when the relative displacement between the powertrain 21 and the drive axle 22 occurs during the running of the vehicle, the axis of the input driven yoke 12 and the axis of the output driving yoke 13 deflect, at this time, the rolling element 15 Roll to an appropriate position along the channel formed by the alignment and buckling of the inner guide groove 131 and the outer guide groove 121, so that the relative position between the input driven yoke 12 and the output driving yoke 13 is deflected and extended, thereby realizing the drive shaft The overall structure of the assembly deflects and extends, and then adapts to the corresponding displacement between the power assembly 21 and the drive axle 22. The above-mentioned action process is mainly realized by the rolling operation of the rolling element 15, and there is no stress concentration between the relevant matching components. Sliding fit, so as to effectively avoid the noise and structural vibration generated during the sliding fit process, and effectively avoid the local overheating phenomenon caused by frequent friction of related components during the sliding fit, so that the transmission efficiency of the drive shaft assembly and the overall The NVH performance of the vehicle is improved accordingly, and the driving process of the vehicle is more stable and comfortable.

It should be noted that the input driving yoke 11, the input driven yoke 12, the output driving yoke 13, and the output driven yoke 14 are all preferably forged parts in order to ensure the structural strength and high-strength working conditions. Of course, in practical applications, the staff can also flexibly choose segmental welding and other processes as the structural forming method of each fork fitting according to the actual working conditions and cost of the vehicle. In principle, as long as it can meet the requirements of the drive shaft The actual use of the assembly can be used.

Specifically, a cage 151 cooperating with each rolling element 15 is provided between the inner wall of the tail end of the input driven yoke 12 and the outer wall of the head end of the output driving yoke 13 . The cage 151 can ensure the coordinated linkage of the rolling elements 15, thereby further improving the relative movement efficiency and structural reliability between the input driven yoke 12 and the output driving yoke 13, and making the overall deflection and The movement efficiency and consistency of the extension are correspondingly improved.

More specifically, the cage 151 is in interference fit with each rolling member 15 , and the cage 151 is in clearance fit with the inner wall of the tail end of the input driven yoke 12 and the outer wall of the head end of the output driving yoke 13 . The interference fit structure can effectively ensure the assembly strength and linkage effect between the cage 151 and the rolling element 15, thereby ensuring that the structural deflection and extension process of the transmission shaft assembly is smoother and more reliable; at the same time, the clearance fit structure can effectively ensure the retention The components between the frame 151 and the input driven yoke 12 and the output driving yoke 13 are relatively independent to avoid structural interference between the cage 151 and the input driven yoke 12 and the output driving yoke 13 .

In addition, two adjacent outer guide grooves 121 cooperate with each other to form a V-shaped oblique outer groove group, and two adjacent inner guide grooves 131 cooperate with corresponding outer guide grooves 121 to form a V-shaped oblique inner groove group. This kind of V-shaped oblique groove group structure formed by matching two adjacent guide grooves can limit the rolling parts 15 in each guide groove to a certain extent, so as to avoid the rolling parts 15 in the normal driving process of the vehicle. Abnormal rolling or dislocation occurs in the guide groove, ensuring the structural reliability of the transmission shaft assembly and the driving stability of the whole vehicle.

On the other hand, a rubber sheath 16 is sheathed on the outer periphery where the rear end of the input driven yoke 12 fits with the head end of the output driving yoke 13 . The rubber sheath 16 can provide soft structural protection for each guide groove structure and rolling elements 15, so as to alleviate the impact of sand or flying stones in the external environment on the mating portion between the output driving yoke 13 and the input driven yoke 12. The structural impact ensures the stable and reliable operation of the transmission shaft assembly.

In addition, both ends of the rubber sheath 16 are fitted with clips 161 in an interference fit. Each clip 161 can securely fit and fix the two ends of the rubber sheath 16 with the input driven yoke 12 and the output driving yoke 13 respectively, so as to ensure the assembly strength of the relevant components and prevent the rubber sheath 16 from being loosened or dislocated. fall off.

Further, cross shaft assemblies 17 are provided between the input driving yoke 11 and the input driven yoke 12 , and between the output driving yoke 13 and the output driven yoke 14 . The structure of each cross shaft assembly 17 is simple and reliable, which can fully ensure the torque transmission efficiency between each yoke, and ensure the structural flexibility and working reliability of the transmission shaft assembly.

More specifically, an elastic support member 18 is provided at the middle of the input driven yoke 12 near its tail end. The elastic support member 18 can provide moderate elastic structural support for the main structure of the transmission shaft assembly, so as to further alleviate the structural impact during the torque transmission process, optimize the stress distribution inside the transmission shaft assembly, and further ensure the The structural reliability and working stability of the transmission shaft assembly are described.

In addition, the rolling elements 15 are steel balls. Specifically, the rolling element 15 can also be an iron ball or a smaller steel ball or other metal rolling element 15 that can be adapted to each guide groove, and the staff can choose flexibly according to the actual working conditions and the assembly needs In principle, the material, shape and size of the rolling element 15 can be as long as it can meet the actual use requirements of the transmission shaft assembly.

In a specific embodiment, the vehicle provided by the utility model includes a vehicle body, a power assembly and a drive axle are arranged inside the vehicle body, and a transmission shaft assembly is connected between the power assembly and the drive axle. The drive shaft assembly is the drive shaft assembly as described in the above embodiments. The driving process of the vehicle is relatively stable and comfortable.

To sum up, in the drive shaft assembly provided in the present utility model, during its assembly operation, when the relative displacement between the power assembly and the drive axle occurs during the running of the vehicle, the axis of the input driven joint yoke and the output driving joint Deflection occurs between the axes of the fork. At this time, the rolling element rolls to an appropriate position along the channel formed by the alignment and fastening of the inner guide groove and the outer guide groove, so that the relative position between the input driven fork and the output driving fork is deflected and extended. , so as to realize the deflection and extension of the overall structure of the transmission shaft assembly, and then adapt the corresponding displacement between the power assembly and the drive axle. Sliding fit with stress concentration effectively avoids noise and structural vibration generated during the sliding fit process, and effectively avoids local overheating of related components caused by frequent friction during sliding fit, thus making the transmission shaft assembly The transmission efficiency and the NVH performance of the whole vehicle are correspondingly improved, and the driving process of the whole vehicle is more stable and comfortable.

In addition, the vehicle provided by the utility model using the above-mentioned drive shaft assembly is more stable and comfortable in the driving process.

The transmission shaft assembly provided by the utility model and the vehicle using the transmission shaft assembly have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present utility model, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (10)

1. a kind of driving-shaft assembly, it is characterised in that: the input including connecting with power assembly actively saves fork and and drive axle The driven section fork of the output of connection, the input are actively sequentially connected between section fork and the driven section fork of the output by power transmission direction There are the driven section fork of input and output actively to save fork, the tail end of the driven section fork of input is set in the head of the output active section fork The outside at end, be provided on the tail end inner wall of the input driven section fork several outer guide grooves, the outer guide groove and the input from The radial section that dynamic section is pitched is not parallel, is provided with several and outer guide groove one by one on the head end outer wall of the output active section fork The interior guide groove of adaptation is corresponded to and aligned in parallel, is movably embedded with and rolls between the outer its corresponding interior guide groove of guide groove Part.

2. driving-shaft assembly as described in claim 1, it is characterised in that: the tail end inner wall of the input driven section fork with it is described The retainer that linkage is cooperateed with each rolling member is provided between the output head end outer wall that actively section is pitched.

3. driving-shaft assembly as claimed in claim 2, it is characterised in that: the retainer is matched with each rolling member interference Close, and the tail end inner wall and the output of the retainer and the input driven section fork actively between the head end outer wall of section fork between Gap cooperation.

4. driving-shaft assembly as described in claim 1, it is characterised in that: complement each other to form V between the adjacent two outer guide groove Type oblique outer groove group accordingly cooperatively forms V-type oblique inside groove group with corresponding outer guide groove between the adjacent two interior guide groove.

5. driving-shaft assembly as described in claim 1, it is characterised in that: the tail end of the driven section fork of input and the output Actively the peripheral part at the head end cooperation of section fork is set with rubber sheath.

6. driving-shaft assembly as claimed in claim 5, it is characterised in that: the equal interference in the both ends of the rubber sheath has card Hoop.

7. driving-shaft assembly as described in claim 1, it is characterised in that: actively section is pitched and the driven section of input for the input Between fork, actively section fork and described export are provided with cross shaft assembly between driven section fork for the output.

8. driving-shaft assembly as described in claim 1, it is characterised in that: the middle part of the driven section fork of input is close to its tail end Place is provided with elastic supporting member for supporting optical member.

9. driving-shaft assembly as described in claim 1, it is characterised in that: the rolling member is steel ball.

10. a kind of vehicle, including vehicle body, be provided with power assembly and drive axle in the vehicle body, the power assembly with it is described Driving-shaft assembly is connected between drive axle, it is characterised in that: the driving-shaft assembly is such as any one of claims 1 to 8 The driving-shaft assembly.