CN216886091U

CN216886091U - Half shaft dynamic vibration absorber's mounting structure, drive shaft assembly and vehicle

Info

Publication number: CN216886091U
Application number: CN202121577608.2U
Authority: CN
Inventors: 王强; 许超楠; 周利鹏
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2022-07-05
Anticipated expiration: 2031-07-12

Abstract

The utility model provides a mounting structure of a half-shaft dynamic vibration absorber, a driving shaft assembly and a vehicle, belonging to the technical field of automobiles, wherein the mounting structure of the half-shaft dynamic vibration absorber comprises: the dynamic vibration absorber comprises a shaft lever and a dynamic vibration absorber, wherein the shaft lever is provided with a hollow cavity extending along the axial direction of the shaft lever; the dynamic vibration absorber is arranged in the hollow cavity of the shaft lever. According to the mounting structure of the half shaft dynamic vibration absorber provided by the utility model, as the dynamic vibration absorber is arranged in the hollow cavity of the shaft lever, the mounting space can be saved, the manufacturing cost is reduced, the service life of the dynamic vibration absorber is prolonged, and the noise reduction performance is improved.

Description

Half shaft dynamic vibration absorber's mounting structure, drive shaft assembly and vehicle

Technical Field

The utility model belongs to the technical field of vehicles, and particularly relates to a mounting structure of a half-shaft dynamic vibration absorber, a driving shaft assembly and a vehicle.

Background

At present, with the improvement of the quality of the whole vehicle, more vehicle enterprises pursue higher NVH performance. The vibration noise of the whole vehicle mainly comes from a power assembly, wherein the vibration noise of the transmission accounts for a large proportion, and the vibration noise of the transmission changes along with the change of the rotating speed and also changes according to different gears. Because the gears of the transmission are engaged differently in different gears, most of the noise is generated by the engagement of the gears, and the driver and passengers in the vehicle feel uncomfortable.

For the vibration noise generated by the transmission, the following noise reduction methods are adopted:

(1) the problem is solved by means of gear modification, meshing overlap ratio increase and the like, but noise under certain gear rotating speeds cannot be completely eliminated by means of the scheme, and development period and cost can be greatly increased by means of gear adjustment.

(2) According to the excitation and propagation path of noise generation, most vehicle enterprises consider increasing half-shaft dynamic vibration absorbers with corresponding frequency on a driving shaft to realize vibration and noise reduction, and the development is simple, efficient, low in cost and short in period, so that the corresponding NVH problem can be met at the fastest speed.

However, the existing half-shaft dynamic vibration absorbers are externally arranged on the shaft rod of the driving shaft, and have the following defects: the half shaft dynamic vibration absorber is fixed through small interference press fitting and clamping hoops, a certain space needs to be reserved in a corresponding position when the whole vehicle is developed, and the requirement of safety and disaster prevention of the whole vehicle is met after the half shaft dynamic vibration absorber is added in the later period, so that the space is increased when the whole vehicle is arranged totally, and the whole vehicle is not favorable for arrangement; the increase of the part cost due to the addition of the corresponding clamping parts; meanwhile, the number of processes is increased, and the manufacturing cost is increased; the main material of the half-shaft dynamic vibration absorber is rubber, the rubber material is exposed outside for a long time and may cause aging, and the frequency of the half-shaft dynamic vibration absorber is influenced after the rubber is aged, so that the frequency is attenuated.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an installation structure of a half shaft dynamic vibration absorber, aiming at solving the problems of large occupied space, high manufacturing cost, easy aging and the like of the existing externally installed half shaft dynamic vibration absorber.

In a first aspect, to achieve the above object, an embodiment of the present invention provides a mounting structure of a half-shaft dynamic vibration absorber, including: the dynamic vibration absorber comprises a shaft lever and a dynamic vibration absorber, wherein the shaft lever is provided with a hollow cavity extending along the axial direction of the shaft lever; the dynamic vibration absorber is arranged in the hollow cavity of the shaft lever.

With reference to the first aspect, in one possible implementation manner, the dynamic vibration absorber includes a mass block and an elastic body disposed outside the mass block, and the dynamic vibration absorber is compressed in the hollow cavity by the elastic body.

With reference to the first aspect, in a possible implementation manner, the dynamic vibration absorber includes a mass block and an elastic body disposed outside the mass block, a friction protrusion is disposed on an inner wall of a hollow cavity of the shaft rod, and the elastic body is compressed in the hollow cavity through the friction protrusion.

With reference to the first aspect, in a possible implementation manner, the elastic body includes an elastic sleeve and a sealing end integrally formed with the elastic sleeve, the elastic sleeve covers the outer circumferential surface of the mass block, the sealing end plugs the two axial ends of the mass block, and the elastic body completely covers the mass block therein.

With reference to the first aspect, in one possible implementation manner, the cross-sectional shape of the elastic sleeve is an i-shape.

With reference to the first aspect, in a possible implementation manner, a through hole penetrating through the mass block is formed in the mass block, and an elastic column is arranged in the through hole of the mass block.

With reference to the first aspect, in one possible implementation manner, the elastic column is integrally formed with the elastic body.

With reference to the first aspect, in one possible implementation manner, the elastic body is made of rubber.

In a second aspect, the embodiment of the present invention further provides a drive shaft assembly, including the mounting structure of the half-shaft dynamic vibration absorber; one end of the shaft lever is provided with a driving shaft moving end, and the other end of the shaft lever is provided with a driving shaft fixing end.

Compared with the prior art, the mounting structure of the half-shaft dynamic vibration absorber and the driving shaft assembly provided by the utility model have the beneficial effects that: the dynamic vibration absorber is arranged in the hollow cavity of the shaft lever, so that the occupied space of the driving shaft assembly cannot be increased, the arrangement of the whole vehicle is not required to be increased, and the arrangement of the whole vehicle is facilitated; other parts such as a clamp and the like are not needed for fixing, the use cost and the installation cost of the parts are reduced, and the manufacturing process is simplified; because the dynamic vibration absorber is inside the axostylus axostyle, do not expose in the outside air, consequently, also avoided ageing and suffer the problem of colliding with, can improve the life of dynamic vibration absorber to can guarantee the NVH performance of whole car, improve the noise quality of whole car.

In a third aspect, the embodiment of the utility model further provides a vehicle, which comprises the driving shaft assembly.

The vehicle that this embodiment provided, owing to set up the half axle dynamic vibration absorber in the cavity of axostylus axostyle, consequently, do benefit to the optimization of the spatial arrangement of whole car, reduce the cost of manufacture of whole car, improve the life of drive shaft assembly, reduce the fault rate that leads to the fact from this, and then can guarantee the noise quality of whole car.

Drawings

FIG. 1 is a schematic structural view of a driveshaft assembly provided in accordance with an embodiment of the present invention;

FIG. 2 is a sectional view taken along line B-B of FIG. 1;

FIG. 3 is a schematic structural diagram of a half-shaft dynamic vibration absorber according to an embodiment of the present invention;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

description of the reference numerals:

1. a drive shaft moving end; 2. a shaft lever; 3. a drive shaft fixing end; 4. a dynamic vibration absorber; 41. an elastomer; 42. a mass block; 43. an elastic column.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1 to 4 together, the mounting structure of the half-shaft dynamic vibration absorber 4 according to the present invention will now be described. The mounting structure of the half-shaft dynamic vibration absorber comprises: the dynamic vibration absorber comprises a shaft lever 2 and a dynamic vibration absorber 4, wherein the shaft lever 2 is provided with a hollow cavity extending along the axial direction of the shaft lever 2; the dynamic vibration absorber 4 is disposed in the hollow cavity of the shaft lever 2.

Compared with the prior art, the mounting structure of the half-shaft dynamic vibration absorber provided by the embodiment has the following characteristics: (1) the dynamic vibration absorber 4 is arranged in the hollow cavity of the shaft lever 2, the space occupation volume of the driving shaft assembly can not be increased, and therefore the whole vehicle arrangement does not need to increase the installation space and is beneficial to the whole vehicle arrangement.

(2) Other parts such as a clamp and the like are not required for fixing, the use cost and the installation cost of the parts are reduced, and the manufacturing process is simplified.

(3) Because the dynamic vibration absorber 4 is inside the axostylus axostyle 2, do not expose in the outside air, consequently, also avoided ageing and suffered the problem of colliding with, can improve half axle dynamic vibration absorber 4's life.

(4) Because the dynamic vibration absorber 4 need not to expose in the air, can avoid the rubber material to expose for a long time and cause ageing in the external world, avoid influencing the frequency of dynamic vibration absorber 4, improve the shock absorption performance of dynamic vibration absorber 4.

(5) The hollow structural design of axostylus axostyle 2 can promote the rigidity of drive shaft greatly, adopts hollow axostylus axostyle 2 simultaneously can reduce product weight, accords with modern lightweight design planning.

As an embodiment of the mounting structure of the half-shaft dynamic vibration absorber 4 provided in the present embodiment, referring to fig. 3 and 4, the dynamic vibration absorber 4 includes a mass 42 and an elastic body 41 provided outside the mass 42, and the dynamic vibration absorber 4 is compressed in the hollow cavity by the elastic body 41. Specifically, axostylus axostyle 2 includes hollow axostylus axostyle section and locates the integral key shaft at axostylus axostyle section both ends, and 4 interference extrusions of dynamic vibration absorber are in hollow axostylus axostyle section, and the integral key shaft welds in hollow axostylus axostyle section both ends.

As an embodiment of the mounting structure of the half-shaft dynamic vibration absorber 4 provided in this embodiment, referring to fig. 3 and 4, the dynamic vibration absorber 4 includes a mass block 42 and an elastic body 41 disposed outside the mass block 42, the inner wall of the hollow cavity of the shaft lever 2 is provided with friction protrusions, and the elastic body 41 is compressed in the hollow cavity through the friction protrusions. Through the friction salient points arranged on the inner wall of the hollow cavity, the friction force between the elastic body 41 and the hollow cavity can be increased, and therefore the reliability of the position of the elastic body 41 is improved. In this embodiment, the friction bumps are uniformly arranged on the inner wall of the hollow cavity, and the dynamic vibration absorber 4 can be reliably fixed at any designated position of the hollow cavity no matter where the elastic body is arranged. Meanwhile, the friction salient points are arranged, so that the rigidity of the shaft lever is increased, and the vibration reduction effect is achieved through the uneven inner walls of the friction salient points.

As an improved embodiment of the dynamic vibration absorber 4 described above, referring to fig. 4, the elastic body 41 includes an elastic sleeve and a sealing end integrally formed with the elastic sleeve, the elastic sleeve is wrapped around the outer circumferential surface of the mass 42, the sealing end seals the two axial ends of the mass 42, and the elastic body 41 completely wraps the mass 42 therein. Because the dynamic vibration absorber 4 provided by the embodiment is press-fitted in the hollow cavity of the shaft lever 2 in an interference manner, the two axial ends of the dynamic vibration absorber 4 do not need to be provided with or reserve installation structures, and the elastic body 41 completely covers the mass block 42, so that the better vibration reduction and absorption effects are achieved.

Based on the elastic body 41, as a modified embodiment of the dynamic vibration absorber 4 provided in this embodiment, referring to fig. 3 and 4, the cross-sectional shape of the elastic sleeve is an i-shape. Elastic sleeve and 2 inner wall direct contact of axostylus axostyle set up to the I-shaped structure, can reduce the area of contact of elastomer 41 and axostylus axostyle 2, improve the effect of inhaling the vibrations to improve the NVH performance of whole car, promote the noise quality in the car.

As shown in fig. 4, the elastic body 41 is provided with a through hole penetrating the mass 42 in the mass 42 of the dynamic vibration absorber 4, and the elastic column 43 is provided in the through hole of the mass 42. The mass block 42 is provided with through holes, so that the overall weight of the dynamic vibration absorber 4 can be reduced, and the weight of the component can be reduced, and meanwhile, the elastic columns 43 are arranged in the mass block, so that the vibration absorbing effect is improved.

In order to further improve the overall vibration absorbing effect, fig. 4 shows another embodiment of the dynamic vibration absorber 4 in which the elastic column 43 is integrally formed with the elastic body 41. Specifically, the elastic body 41 is made of rubber. The elastomeric sleeve, the sealing end and the elastomeric post 43 and mass 42 are formed by a vulcanization process.

The installation structure of the half-shaft dynamic vibration absorber 4 provided in the present embodiment is implemented as follows: according to the frequency section generated by the whole vehicle, the frequency of the dynamic vibration absorber 4 is designed, the frequency of the dynamic vibration absorber 4 is related to the mass, tuning factor, damping ratio and the like of the mass block 42, and after all parameters are determined, the external dimension which is in accordance with the internal diameter of the shaft lever 2 is selected to be matched with the external dimension of the dynamic vibration absorber 4. Because the dynamic vibration absorber is not limited by the space of the whole vehicle layout scheme, the dynamic vibration absorber 4 can realize a wider frequency range under the same size condition, and the dynamic vibration absorber is guaranteed to be better matched with the whole vehicle.

The shaft lever is made as follows: according to the designed frequency parameters of the dynamic vibration absorber 4, the dynamic vibration absorber is manufactured on the mass block 42 through rubber vulcanization; then, the modal test is carried out to reach the relevant technical requirements, for the shaft lever of the driving shaft with limited specification, the prepared mass block 42 is pressed and loaded into the designated position in the hollow shaft lever 2 through the pressing and loading equipment, the position fixation is ensured through the external dimension of the dynamic vibration absorber 4 and the interference magnitude of the hollow cavity of the shaft lever 2, and thus, other auxiliary parts are not needed to be used for fixing the shaft lever, and the later-stage use requirements can be met. And for the pressed hollow shaft rod, welding the splines at the two ends in a friction welding mode, and finally realizing the complete shaft rod design.

The mounting structure that this embodiment provided is not only limited to increase dynamic vibration absorber 4 in axostylus axostyle 2 to improve whole car NVH performance, also can increase this mounting structure or similar structure in the central siphon of four-wheel drive motorcycle type intermediate drive axle simultaneously, improve the NVH performance of whole car.

Based on the same inventive concept, referring to fig. 1 and fig. 2, the embodiment of the present application further provides a driving shaft assembly, which includes a mounting structure of the half-shaft dynamic vibration absorber; wherein, the one end of axostylus axostyle 2 is equipped with drive shaft and removes end 1, and the other end is equipped with drive shaft stiff end 3.

Based on the same inventive concept, the embodiment of the utility model also provides a vehicle comprising the driving shaft assembly.

The vehicle that this embodiment provided, owing to set up the dynamic vibration absorber in the cavity of axostylus axostyle 2, do benefit to the optimization of the spatial arrangement of whole car, reduce the cost of manufacture of whole car, improve the life of drive shaft assembly, reduce the fault rate that causes from this, improve the interior NVH performance of car, improve the noise quality of whole car.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A mounting structure of a half-shaft dynamic vibration absorber, characterized by comprising:

the shaft lever (2) is provided with a hollow cavity extending along the axial direction of the shaft lever (2); and

and the dynamic vibration absorber (4) is arranged in the hollow cavity of the shaft lever (2).

2. The mounting structure of the half shaft dynamic vibration absorber of claim 1 wherein the dynamic vibration absorber (4) includes a mass (42) and an elastic body (41) provided outside the mass (42), the dynamic vibration absorber being compressed within the hollow chamber by the elastic body.

3. The mounting structure of the half shaft dynamic vibration absorber according to claim 1, wherein said dynamic vibration absorber (4) comprises a mass (42) and an elastic body (41) provided outside said mass (42), an inner wall of a hollow cavity of said shaft rod (2) is provided with friction protrusions, and said elastic body (41) is compressed in said hollow cavity through said friction protrusions.

4. The half-shaft dynamic vibration absorber mounting structure according to claim 2 or 3, wherein said elastic body (41) includes an elastic sleeve and a sealing end formed integrally with said elastic sleeve, said elastic sleeve covering an outer circumferential surface of said mass (42), said sealing end sealing both axial ends of said mass (42), said elastic body covering said mass (42) completely therein.

5. The half-shaft dynamic vibration absorber mounting structure as defined in claim 4, wherein said elastic bushing has an i-shaped cross-sectional shape.

6. The mounting structure of the axle shaft dynamic vibration absorber of claim 4, wherein said mass block (42) is provided with a through hole penetrating said mass block (42), and said through hole of said mass block (42) is provided with an elastic column (43).

7. The half shaft dynamic vibration absorber mounting structure according to claim 6, wherein said elastic column (43) is formed integrally with said elastic body (41).

8. The half shaft dynamic vibration absorber mounting structure as defined in claim 2 or 3, wherein said elastic body (41) is of a rubber material.

9. A drive shaft assembly comprising the mounting structure of the axle shaft dynamic vibration absorber according to any one of claims 1 to 8; one end of the shaft lever (2) is provided with a driving shaft moving end (1), and the other end is provided with a driving shaft fixing end (3).

10. A vehicle comprising the drive axle assembly of claim 9.