CN111043175B

CN111043175B - Sheath group, drive semi-axis assembly and vehicle

Info

Publication number: CN111043175B
Application number: CN201911168764.0A
Authority: CN
Inventors: 崔润�; 张雷; 陈涛
Original assignee: BAIC Motor Co Ltd
Current assignee: BAIC Motor Co Ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2021-01-19
Anticipated expiration: 2039-11-25
Also published as: CN111043175A

Abstract

The invention relates to an automobile driving half shaft assembly, and particularly discloses a sheath set which comprises a left sheath (1a) and a right sheath (1b), wherein the left sheath (1a) comprises a first port (11), a corrugated deformation area (13) and a second port (12) which are sequentially connected, and the corrugated deformation area (13) is provided with a dehydration structure which is suitable for reducing liquid on the surfaces of the left sheath (1a) and the right sheath (1 b). The sheath set can quickly reduce the liquid residual quantity on the surface of the sheath set, so that the sheath set cannot generate abnormal sound after being extruded and deformed when meeting water.

Description

Sheath group, drive semi-axis assembly and vehicle

Technical Field

The invention relates to an automobile driving half shaft assembly, in particular to a sheath group. In addition, the invention also relates to a driving half shaft assembly and a vehicle.

Background

The automobile half shaft is also called a driving shaft, is a shaft for transmitting torque between a gearbox and a driving wheel, and is provided with a universal joint at the inner end and the outer end respectively, and is connected with a speed reducer gear and a hub bearing inner ring through a spline on the universal joint respectively. The universal joint is usually wrapped with a sheath which is used for water, dust and sealing and also for preventing grease from running off; during operation, the sheath can be buckled along with the bending of universal joint, because the position of bending of sheath constantly changes, and the deformation frequency is higher for the sheath time has been long can ageing fracture. Therefore, the prior art carries out a series of improvements aiming at the common defects of the sealing performance, the service life and the like of the universal joint sheath.

However, when the automobile runs through a water accumulation road surface or runs in wading, liquid is left on the surface of the sheath, when the automobile turns to, particularly when the automobile turns to a limit position, the corrugated part of the sheath is extruded and deformed to a great extent, when the liquid is left in the corrugated part, the probability of relative sliding between the corrugations and the displacement of the relative sliding can be increased when the adjacent corrugations are mutually extruded and rubbed, the sheath can generate abnormal sound, and the driving experience of a driver is influenced.

In view of the above, a new sheath is needed.

Disclosure of Invention

The present invention provides a sheath assembly that does not generate abnormal noise when the sheath assembly is extruded and deformed in a water-covered state.

The second aspect of the present invention is to provide a driving half shaft assembly, which does not generate abnormal noise when steering after wading.

A third aspect of the present invention is to provide a vehicle that does not generate abnormal noise when turning after wading.

In order to solve the technical problem, a first aspect of the present invention provides a sheath set, which includes a left sheath and a right sheath, wherein the left sheath includes a first port, a corrugated deformation region and a second port, which are connected in sequence, and the corrugated deformation region has a dehydration structure.

Specifically, the dewatering structure is a plurality of spiral structures extending from troughs to crests of the corrugated deformation zone.

Preferably, the helical structure is a helical protrusion or a helical groove.

Further preferably, the spiral protrusion is a constant cross-section protrusion, and the spiral groove is a constant cross-section groove.

Preferably, the left sheath is a solid of revolution having a radial dimension that gradually increases from the first port to the second port.

Preferably, the helical structure of the left sheath rotates counterclockwise about a central axis of the left sheath first port from the left sheath first port to the left sheath second port.

Specifically, the right sheath and the left sheath are of a symmetrical structure.

Typically, the left sheath and the right sheath are both rubber products and are both integrally formed parts.

The second aspect of the invention provides a driving half shaft assembly, which comprises a left half shaft fixed joint assembly, a right half shaft fixed joint assembly and a sheath group in any one of the technical solutions of the first aspect; the left half shaft fixed joint assembly comprises a fixed joint, a hoop, a shaft rod and the left sheath, the shaft rod is fixedly connected with a first port of the left sheath through the hoop, and the fixed joint is fixedly connected with a second port of the left sheath through the hoop; the right half axle fixed knot assembly comprises the right sheath and is of a symmetrical structure with the left half axle fixed knot assembly.

In a third aspect, the invention provides a vehicle comprising the drive axle shaft assembly of the second aspect.

In the basic technical scheme of the invention, the sheath group comprises a left sheath and a right sheath, and as the corrugated deformation area of the sheath group is provided with the dehydration structure, when the sheath group rotates, liquid on the surface of the sheath can be guided by the dehydration structure under the action of centrifugal force and thrown out. This sheath group simple structure to effectively reduced the quantity of residue of sheath group surface liquid, makeed the sheath group can not produce the abnormal sound after being extruded and warp under the state of covering water.

Further advantages of the present invention, as well as the technical effects of preferred embodiments, are further described in the following detailed description.

Drawings

FIG. 1 is a schematic diagram of a right sheath in one embodiment of a sheath assembly of the present invention;

FIG. 2 is a cross-sectional view of section A-A of FIG. 1;

FIG. 3 is a schematic view of a left sheath of an embodiment of a sheath assembly of the present invention;

FIG. 4 is a cross-sectional view of section B-B of FIG. 3;

FIG. 5 is a schematic structural view of a left axle shaft retainer assembly in one embodiment of the drive axle shaft assembly of the present invention;

FIG. 6 is a schematic structural diagram of a right half shaft fixed joint assembly in one embodiment of the driving half shaft assembly of the present invention.

Description of the reference numerals

1 sheath group 1a left sheath

1b right sheath 11 first port

12 second port 13 corrugated deformation zone

14 helical structure

2 fixed knot 3 clamp

4 intermediate shaft lever

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "disposed" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; the two elements may be connected directly or indirectly through intervening media, or may be connected through one another or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 4, an embodiment of the sheath set of the present invention comprises a left sheath 1a and a right sheath 1b, wherein the left sheath 1a comprises a first port 11, a corrugated deformation zone 13 and a second port 12 connected in sequence, and the corrugated deformation zone 13 has a dewatering structure adapted to reduce the residual amount of liquid on the surface of the sheath set 1. The right sheath 1b and the left sheath 1a are symmetrical structures which are matched with the structure of a driving half shaft of a vehicle. In general, the composition of the drive shaft from the wheel end to the transmission end is as follows: a fixed constant velocity universal joint (hereinafter referred to as a fixed joint), an intermediate shaft lever 4 or an intermediate shaft tube, and a movable constant velocity universal joint. The first port 11 of the left sheath 1a is fixedly connected with the middle shaft rod 4, the second port 12 of the left sheath 1a is connected with the fixed joint 2, and the corresponding right sheath 1b and the left sheath 1a are symmetrical. Sheath among the prior art is in the use, and behind ponding road surface or the wading of driving that the car was gone, the sheath surface has liquid to remain, when the vehicle turns to, especially when turning to extreme condition, the sheath is by the extrusion deformation of very big degree, and when the sheath surface had liquid to remain and mutual extrusion friction, can increase the relative probability of sliding in sheath deformation zone and the degree of relative sliding, the sheath can produce abnormal sound this moment, influences driver's driving experience. In one embodiment of the sheath set 1 of the present invention, the sheath set 1 has a dewatering structure, so that when the sheath set 1 rotates along with the intermediate shaft rod 4, the liquid on the surface of the sheath set 1 is gathered at the dewatering structure under the action of centrifugal force and then thrown out, the sheath set 1 of the structure not only has easy manufacture and convenient installation, but also has good flow guiding effect on the liquid on the surface of the sheath, can effectively reduce the liquid residual quantity on the surface of the sheath set, and reduce the possibility of abnormal sound generated when the corrugated deformation zones 13 of the sheath set 1 are mutually extruded; and accelerate the drying rate of the sheath group 1 after wading into water, avoid the sheath group 1 to be in the humid state for a long time, improved the life of sheath group 1.

Preferably, referring to fig. 2 and 4, the wave-deforming zone 13 of the left sheath 1a is provided with a dewatering structure in the form of a plurality of spirals 14 extending from a valley to a peak of the wave-deforming zone 13, the spirals 14 may be in the form of archimedes' spirals or involute lines, and the dewatering structure facilitates the liquid to pool and move at the spirals 14.

More preferably, the spiral structure 14 of the corrugated deformation region 13 of the left sheath 1a is a spiral protrusion or a spiral groove, and the spiral protrusion or the spiral groove may be a solid protrusion or a groove formed on the outer surface of the corrugated deformation region 13 of the sheath set 1, or an outward protrusion or an inward groove formed on the inner and outer surfaces of the corrugated deformation region 13 together. The left sheath 1a rotates to enable liquid to be gathered at the spiral protrusion or the spiral groove under the action of centrifugal force, and the gathered liquid is more easily thrown out along the spiral protrusion or the spiral groove. However, the dewatering structure of the left sheath 1a is not limited to the spiral protrusion or the spiral groove, and may be a protrusion or a groove of other shapes extending from the wave trough to the wave crest of the corrugated deformation region 13 of the left sheath 1a, such as a linear groove or a linear protrusion, which also has a certain converging and draining function.

More preferably, the spiral protrusion is a constant cross-section protrusion, the spiral groove is a constant cross-section groove, and the cross-section of the spiral protrusion or the spiral groove may be rectangular, circular arc, or the like.

Typically, the left sheath 1a is a solid of revolution having a radial dimension that increases progressively from the first port 11 to the second port 12, suitable for mounting on a half shaft retainer assembly.

Specifically, from the first port 11 of the left sheath 1a to the second port 12 of the left sheath 1a, the helical structure 14 of the left sheath 1a rotates counterclockwise about the central axis of the first port 11 of the left sheath 1 a. The rotating direction of the spiral structure 14 is suitable for throwing out the liquid on the surface of the left sheath 1a, when the automobile normally runs, the liquid on the left sheath 1a is gathered at the spiral structure 14, and the liquid on the left sheath 1a is thrown out through the centrifugal force generated by rotation. When the left sheath 1a and the right sheath 1b are paired for use, since the left sheath 1a and the right sheath 1b are symmetrical structures, the rotating directions of the helical structure of the right sheath 1b and the helical structure 14 of the left sheath 1a are opposite, so that when the sheath set 1 is mounted on a driving half shaft, the helical structures 14 of the left sheath 1a and the helical structure of the right sheath 1b are both opposite to the rotating direction of the half shaft when the automobile runs forwards.

Typically, the sheath group 1 is a rubber product capable of generating elastic deformation, and the sheath group 1 of the present invention has a simple structure, can meet the process requirement of integral molding, further reduces the processing cost, and shortens the processing time.

Referring to fig. 1 to 4, the sheath assembly 1 in the preferred embodiment of the present invention includes a left sheath 1a and a right sheath 1b used in pair, the left sheath 1a and the right sheath 1b are symmetrical structures, and the structure of the left sheath 1a is described below with emphasis. The left sheath 1a comprises a first port 11, a corrugated deformation area 13 and a second port 12 which are connected in sequence, the left sheath 1a is a rotary body, the radial dimension of the rotary body is gradually increased from the first port 11 to the second port 12, and the corrugated deformation area 13 has a dehydration structure. Wherein, the dewatering structure is a plurality of spiral protrusions or spiral grooves extending from the wave troughs to the wave crests of the corrugated deformation zone 13, and the spiral protrusions or spiral grooves can be equal-section protrusions or grooves so as to facilitate production and processing. The direction of rotation of the helix 14 on the left sheath 1a is opposite to the direction of rotation of the half-shafts when the vehicle is travelling forward: from the first port 11 of the left sheath 1a to the second port 12 of the left sheath 1a, the helix 14 of the left sheath 1a rotates anticlockwise around the central axis of the first port 11 of the left sheath 1 a. When the automobile normally runs, the liquid on the left sheath 1a is gathered towards the spiral structure 14, and the liquid on the left sheath 1a is thrown out through the rotating centrifugal force, so that after the left sheath 1a is extruded and deformed to a large extent, no abnormal sound is generated, correspondingly, the structure of the right sheath 1b is symmetrical to the left sheath 1a, namely the spiral structure of the right sheath 1b is opposite to the rotating direction of the spiral structure 14 of the left sheath 1a, and the working principle of the right sheath 1b is the same as that of the left sheath 1 a.

The embodiment of the driving half shaft assembly of the invention, referring to fig. 5 and 6, comprises a left half shaft fixed joint assembly, a right half shaft fixed joint assembly and a sheath group 1 according to any one of the above technical solutions; the left half shaft fixing joint assembly comprises a fixing joint 2, a hoop 3, a middle shaft rod 4 and a left sheath 1a, wherein a first port 11 of the left sheath 1a is fixedly connected with the middle shaft rod 4 through the hoop 3, and a second port 12 of the left sheath 1a is fixedly connected with the fixing joint 2 through the hoop 3; the right half shaft fixed knot assembly comprises a right sheath 1b which is symmetrical to the structure of the left sheath 1a, and the right half shaft fixed knot assembly and the left half shaft fixed knot assembly are symmetrical structures. When the automobile normally travels, the middle shaft lever 4 rotates to drive the sheath set 1 to rotate, and residual liquid on the outer surface of the sheath set 1 is converged at the dehydration structure of the sheath set 1 under the action of centrifugal force, and finally the liquid is thrown out. After the automobile wades, the sheath set 1 is driven by the middle rotating shaft 4 to rotate, so that liquid residues on the surface of the sheath set 1 are quickly reduced, the drying speed of the sheath set 1 can be increased, and the service life of the sheath set 1 is prolonged; in addition, when the vehicle turns, particularly turns to the limit state, more liquid remains on the surface of the conventional sheath, abnormal sound is generated when deformation regions of the sheath are mutually extruded, and the sheath set 1 can reduce the possibility of abnormal sound generated by the driving half shaft assembly.

Embodiments of the vehicle of the present invention may include a drive axle shaft assembly as described in the embodiments above, and thus will have at least all of the benefits associated with the embodiments of the drive axle shaft assembly described above.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims

1. A set of sheaths, characterized in that it comprises a left sheath (1a) and a right sheath (1b), wherein the left sheath (1a) comprises a first port (11), a corrugated deformation zone (13) and a second port (12) connected in sequence, the corrugated deformation zone (13) having a dewatering structure which is a plurality of helical structures (14) extending from the troughs to the crests of the corrugated deformation zone (13).

2. The jacket set of claim 1, wherein the helical structure (14) is a helical protrusion or a helical groove.

3. The sheath assembly of claim 2 wherein the helical projection is a constant cross-section projection and the helical groove is a constant cross-section groove.

4. Set according to claim 1, characterized in that the left jacket (1a) is a body of revolution whose radial dimension increases progressively from the first port (11) to the second port (12).

5. Set according to claim 1, characterized in that the helix (14) of the left sheath (1a) rotates anticlockwise around the central axis of the first port (11) of the left sheath (1a) from the first port (11) of the left sheath (1a) to the second port (12) of the left sheath (1 a).

6. The group according to any of the claims from 1 to 5, characterised in that the right sheath (1b) and the left sheath (1a) are of symmetrical structure.

7. The set of sheaths according to claim 6, characterized in that said left sheath (1a) and right sheath (1b) are both rubber articles and are both one-piece.

8. A drive axle shaft assembly comprising a left axle shaft fixed joint assembly, a right axle shaft fixed joint assembly and a sheath set according to any one of claims 1 to 7; the left half shaft fixed joint assembly comprises a fixed joint (2), a hoop (3), an intermediate shaft lever (4) and a left sheath (1a), wherein the intermediate shaft lever (4) is fixedly connected with a first port (11) of the left sheath (1a) through the hoop (3), and the fixed joint (2) is fixedly connected with a second port (12) of the left sheath (1a) through the hoop (3); the right half shaft fixed joint assembly comprises the right sheath (1b) and is in a symmetrical structure with the left half shaft fixed joint assembly.

9. A vehicle comprising the drive axle shaft assembly of claim 8.