CN217002960U - Dual dustproof construction, drive shaft assembly and vehicle - Google Patents

Abstract

The utility model provides a double dustproof structure, a driving shaft assembly and a vehicle, belonging to the technical field of dust prevention and comprising a first dustproof cover and a second dustproof cover, wherein the first dustproof cover is assembled on a half shaft, and the opening end of the first dustproof cover is arranged on the outer side of a shell in an enclosing manner to form first heavy dust prevention of an oil seal; the second dust cover is assembled on the differential mechanism and arranged between the first dust cover and the oil seal, and the opening end of the second dust cover abuts against the inner side wall of the shell to form second dust prevention of the oil seal. According to the double dustproof structure provided by the embodiment, the second dustproof cover and the first dustproof cover are sequentially arranged on the outer side of the oil seal to serve as double protection, and the first dustproof cover can block most of sand and dust and water outside; when little dust and water enter the first dust cover along the clearance between the first dust cover and the shell, the blocking of the second dust cover stops, so that the problem that the oil seal is abnormally worn and loses efficacy due to dust and sand accumulation is avoided.

Description

Dual dustproof construction, drive shaft assembly and vehicle

Technical Field

The utility model belongs to the technical field of dust prevention, and particularly relates to a double dust prevention structure, a driving shaft assembly utilizing the double dust prevention structure and a vehicle with the driving shaft assembly.

Background

Automotive axle shafts generally refer to mechanisms located at the end of a drive train that change rotational speed and torque from a transmission and transmit them to drive wheels. One end of the half shaft is connected with the tire, the other end of the half shaft is connected with the differential mechanism through a spline, and the power of the transmission is transmitted to the tire through the differential mechanism and the half shaft; the outside of differential mechanism is equipped with the casing, installs the oil blanket between casing and the differential mechanism, and the oil blanket seal lip generally is the rubber material, when external dust and sand piles up in oil blanket department, causes the unusual wearing and tearing of oil blanket very easily to cause sealed inefficacy oil leak, and then lead to the vehicle unusual trouble to appear.

At present, although the prior art adopts a dust cover to protect an oil seal, the problem of abrasion failure of the oil seal still exists in a single dust cover.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a double dustproof structure, a driving shaft assembly and a vehicle, and aims to solve the problem of oil leakage caused by abrasion failure of an oil seal.

In order to achieve the above object, in a first aspect, the present invention adopts the following technical solutions: provided is a dual dustproof structure including: the first dust cover is assembled on the half shaft, and the opening end of the first dust cover is arranged on the outer side of the shell in a surrounding manner to form first heavy dust prevention of the oil seal; the second dust cover is assembled on the differential mechanism and arranged between the first dust cover and the oil seal, and the opening end of the second dust cover is abutted against the inner side wall of the shell to form second dust prevention of the oil seal.

With reference to the first aspect, in a possible implementation manner, a gap between the first dust cover and the housing forms a dust and sand damping port, and the first dust cover is provided with a dust and sand discharge port in the axial direction of the half shaft.

With reference to the first aspect, in a possible implementation manner, the dust and sand discharge ports are disposed on a central hole wall of the first dust cover, where the first dust cover is engaged with the half shaft, and the plurality of dust and sand discharge ports are uniformly distributed along a circumferential direction of the central hole wall.

With reference to the first aspect, in one possible implementation manner, the first dust cover is press-fitted on the axle shaft in an interference manner, and the central hole wall has a shoulder extending axially in the direction of the differential.

With reference to the first aspect, in one possible implementation manner, the open end of the second dust cover is provided with a sealing lip abutting against the inner side wall of the housing.

With reference to the first aspect, in one possible implementation, the sealing lip axial width is greater than an axial width of the second dust cover.

With reference to the first aspect, in one possible implementation manner, the second dust cover further has a bow portion avoiding the oil seal.

With reference to the first aspect, in one possible implementation manner, the second dust cover is press-fitted onto the differential with interference, and an outer end thereof is flush with an outer end of the differential.

Compared with the prior art, the double dustproof structure provided by the utility model has the beneficial effects that: the second dust cover and the first dust cover are sequentially arranged on the outer side of the oil seal, the first dust cover is arranged on the outer side of the shell in an enclosing mode, the first dust cover has a first heavy protection effect on blocking of sand dust and water, most of the sand dust and the water can be blocked outside, and direct encounter of most of the sand dust and the water with the oil seal is avoided; when a very small amount of dust and water enter the first dust cover along the clearance between the first dust cover and the shell, the dust and water can stop under the blocking of the second dust cover, the second dust cover forms second double protection, the possibility of direct contact between the dust and the water and the oil seal is prevented, so that the problem of abnormal abrasion failure caused by accumulation of dust and sand on the oil seal is avoided, the double protection plays a good role in protecting the oil seal, the normal design service life of the oil seal can be ensured, and the abnormal oil leakage and the failure frequency of the whole vehicle are reduced.

In a second aspect, the embodiment of the present invention further provides a drive shaft assembly, which includes the dual dustproof structure.

In a third aspect, embodiments of the present invention further provide a vehicle, including the driving shaft assembly.

According to the driving shaft assembly and the vehicle, due to the fact that the double dustproof structures are adopted to protect the oil seal, the problem that the oil seal is abnormally abraded and fails is solved, the failure frequency of the whole vehicle is reduced, and the use quality of the whole vehicle is improved.

Drawings

Fig. 1 is a schematic structural diagram of a dual dustproof structure according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

description of the reference numerals:

1. a half shaft; 2. a first dust cover; 3. a housing; 4. a differential mechanism; 5. oil sealing; 6. a sand discharge port; 7. a second dust cover; 8. a sand and dust damping port; 9. sealing the lip.

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 and fig. 2, the dual dustproof structure provided by the present invention will now be described. The dual dustproof structure includes: the first dust cover 2 is assembled on the half shaft 1, and the open end of the first dust cover 2 is arranged at the outer side of the shell 3 in a surrounding manner to form a first dust prevention function of the oil seal 5; the second dust cover 7 is assembled on the differential 4 and is arranged between the first dust cover 2 and the oil seal 5, and the opening end of the second dust cover abuts against the inner side wall of the shell 3 to form second dust prevention of the oil seal 5.

This embodiment provides dual dustproof construction compares with prior art, has set gradually second dust cover 7 and first dust cover 2 as dual protection in the outside of oil blanket 5, and first dust cover 2 encloses the outside of establishing at casing 3, and first dust cover 2 plays the effect of first heavy protection to blocking of sand and dirt and water, can block most sand and dirt and water outside, has avoided most sand and dirt and water and oil blanket 5's direct meeting.

Because the inevitable meeting of cooperation between the part has the clearance, when very little dust and water gets into in the first dust cover 2 along first dust cover 2 and casing 3 complex clearance, can stop step under blockking of second dust cover 7, second dust cover 7 constitutes the second and heavily protects, the possibility of dust and water with oil blanket 5 direct contact has been prevented, thereby the problem of the unusual wearing and tearing inefficacy that oil blanket 5 leads to because of the dust and sand is piled up has been avoided, the dual protection has played fine guard action to oil blanket 5, can guarantee the normal design life of oil blanket 5, reduce unusual oil leak and the trouble frequency of whole car.

In some embodiments, referring to fig. 1 and 2, a gap between the first dust cover 2 and the housing 3 forms a dust damping port 8, and the first dust cover 2 is provided with a dust discharge port 6 along the axial direction of the axle shaft 1. Because expose dust and sand partly can get into the dustproof chamber that constitutes between first dust cover 2 and the second dust cover 7 through dust and sand damping mouth 8, in order to avoid long-pending accumulation that causes the sand and sand in dustproof chamber piles up, set up dust and sand discharge port 6, dust and sand and water that get into the cavity from dust and sand damping mouth 8 can follow dust and sand discharge port 6 and discharge to prevent that the sand and sand from piling up the wearing and tearing to second dust cover 7.

It should be noted that the axial directions mentioned in the present embodiment and the following embodiments are axial directions of the half shaft 1, and will not be explained below.

In some embodiments, referring to fig. 1 and 2, the dust and sand discharge ports 6 are disposed on a central hole wall of the first dust cover 2 matched with the half shaft 1, and the plurality of dust and sand discharge ports 6 are uniformly distributed along the circumferential direction of the central hole wall. Because the first dust cover 2 is the corner position of easy sediment sand dirt with the matched centre bore of semi-axis 1, set up sand dirt discharge port 6 on the centre bore wall, can avoid sand dirt to pile up on semi-axis 1, the wearing and tearing problem that causes semi-axis 1.

Alternatively, the dust discharge port 6 is a semicircular or semicircular elliptical hole arranged in the axial direction.

In some embodiments, referring to fig. 1 and 2, the first dust cover 2 is press-fitted on the axle shaft 1 with interference, and the central hole wall has a shoulder extending axially toward the differential 4. Through the circular bead that sets up, the assembly area of first dust cover 2 with semi-axis 1 is increased to improve the intensity of the assembly of first dust cover 2, avoid first dust cover 2 to take place deformation and lose the guard action's possibility.

In some embodiments, referring to fig. 1 and 2, the open end of the second dust cover 7 is provided with a sealing lip 9 that abuts against the inner side wall of the housing 3. The sealing lip edge 9 and the shell 3 can be tightly matched, dust in a dustproof cavity is prevented from entering the oil seal 5, and the accumulation of sand and dust outside the oil seal and the abrasion of the oil seal 5 caused by daily accumulation and long-term accumulation are avoided.

The sealing lip 9 is injection molded at the open end of the second dust cover 7, and the material may be rubber, or plastic (e.g., teflon), or the like.

In some embodiments, referring to fig. 1 and 2, the sealing lip 9 has an axial width greater than the axial width of the second dust cover 7. Through the width that increases sealing lip limit 9, increased sealing lip limit 9 and the area of contact of casing 3 to can improve dirt-proof effect, avoid the entering of micronic dust and water.

In some embodiments, referring to fig. 1 and 2, the second dust cover 7 further has an arch (the name is not labeled in the figures) avoiding the oil seal 5. As seen from the axial section of the second dust cover 7, the second dust cover 7 is of a bent structure, the arched part is prevented from being in direct contact with the oil seal 5, the strength of the second dust cover 7 can be improved, and the problem that the second dust cover 7 is deformed abnormally in the service cycle to cause dust prevention failure is avoided.

In some embodiments, referring to fig. 1 and 2, the second dust cover 7 is press fit over the differential 4 with its outer end flush with the outer end of the differential 4. The direct connection part of the second dust cover 7 and the differential 4 extends to be flush with the shaft end of the differential 4, so that the contact surface of the second dust cover 7 and the differential 4 can be increased, and the reliability of assembly of the second dust cover 7 is improved.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Based on the same inventive concept, the embodiment of the application also provides a driving shaft assembly which comprises the double dustproof structure.

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

According to the drive shaft assembly and the vehicle, due to the fact that the double dustproof structures are adopted to protect the oil seal, the problem that the oil seal is abnormally abraded and loses efficacy is avoided, the failure frequency of the whole vehicle is reduced, and the use quality of the whole vehicle is improved.

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 (10)

1. A dual dustproof structure, comprising:

the first dustproof cover (2) is assembled on the half shaft (1), and the open end of the first dustproof cover is arranged on the outer side of the shell (3) in a surrounding mode to form first heavy dustproof of the oil seal (5); and

and the second dust cover (7) is assembled on the differential (4) and arranged between the first dust cover (2) and the oil seal (5), and the opening end of the second dust cover is abutted against the inner side wall of the shell (3) to form second dust prevention of the oil seal (5).

2. The double dust-proof structure as claimed in claim 1, wherein a clearance between the first dust cover (2) and the housing (3) constitutes a sand-dust damping port (8), and the first dust cover (2) is provided with a sand-dust discharge port (6) in the axial direction of the half shaft (1).

3. The dual dustproof structure according to claim 2, wherein the dust and sand discharge ports (6) are provided on a wall of a center hole of the first dustproof cover (2) engaged with the half shaft (1), and a plurality of the dust and sand discharge ports (6) are evenly distributed in the circumferential direction of the wall of the center hole.

4. A dual dust protection arrangement according to claim 3, wherein said first dust boot (2) is interference-fitted over said axle half shaft (1) and said bore wall has a shoulder extending axially towards said differential (4).

5. A dual dust protection arrangement according to claim 1, wherein the open end of the second dust cover (7) is provided with a sealing lip (9) which abuts against the inner side wall of the housing (3).

6. A dual dust protection arrangement according to claim 5, wherein the sealing lip (9) has an axial width greater than the axial width of the second dust cover (7).

7. The dual dustproof structure according to claim 1, wherein said second dustproof cover (7) further has a bow portion avoiding said oil seal (5).

8. The dual dust protection arrangement according to claim 1, wherein said second dust cover (7) is press-fitted over said differential (4) with its outer end flush with the outer end of said differential (4).

9. A drive shaft assembly comprising a dual dust protection arrangement as claimed in any one of claims 1 to 8.

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

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