CN113682088B

CN113682088B - Driving axle wheel end structure and vehicle

Info

Publication number: CN113682088B
Application number: CN202111066918.2A
Authority: CN
Inventors: 冯涛; 牛湛滔; 王俊豪
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2023-06-20
Anticipated expiration: 2041-09-13
Also published as: CN113682088A

Abstract

The invention discloses a driving axle wheel end structure and a vehicle, and relates to the technical field of automobile axles. This transaxle wheel end structure includes: the axle housing body and the axle head are sequentially sleeved on the axle shaft from inside to outside along the axial direction of the axle shaft; the hub comprises an inner half hub and an outer half hub which are detachably connected, and the inner half hub and the outer half hub are sequentially sleeved on the half shaft mechanism from inside to outside along the axial direction of the half shaft mechanism; the bearing comprises an inner bearing and an outer bearing, wherein the inner bearing is arranged between the axle housing body and the inner half hub, two axial sides of the inner bearing are respectively abutted with the inner half hub and the axle head, the outer bearing is arranged between the axle head and the outer half hub, and two axial sides of the outer bearing are respectively abutted with the axle head and the outer half hub. The invention can reduce the axial size of the shaft head, lighten the whole weight of the drive axle and reduce the cost.

Description

Driving axle wheel end structure and vehicle

Technical Field

The invention relates to the technical field of automobile axles, in particular to a driving axle wheel end structure and a vehicle.

Background

For the driving axle used for the current vehicle, the wheel end of the driving axle is provided with a shaft head, and a bearing and a wheel hub are sleeved outside the shaft head in sequence. Meanwhile, a lock nut structure is further arranged at the outer end of the shaft head and used for fixing the bearing. However, this configuration results in a larger axial dimension of the stub shaft and higher overall weight and cost of the drive axle.

Based on this, there is a need for a drive axle wheel end structure and a vehicle for solving the above problems.

Disclosure of Invention

The invention aims to provide a driving axle wheel end structure and a vehicle, which can reduce the axial size of a shaft head, lighten the overall weight of a driving axle and reduce the cost.

To achieve the purpose, the invention adopts the following technical scheme:

the invention provides a drive axle wheel end structure, which comprises:

the axle housing body and the axle head are sequentially sleeved on the axle shaft from inside to outside along the axial direction of the axle shaft;

the hub comprises an inner half hub and an outer half hub which are detachably connected, and the inner half hub and the outer half hub are sequentially sleeved on the half shaft mechanism from inside to outside along the axial direction of the half shaft mechanism;

the bearing comprises an inner bearing and an outer bearing, wherein the inner bearing is installed between the axle housing body and the inner half hub, two axial sides of the inner bearing are respectively abutted to the inner half hub and the shaft head, the outer bearing is installed between the shaft head and the outer half hub, and two axial sides of the outer bearing are respectively abutted to the shaft head and the outer half hub.

Optionally, a limiting protrusion is arranged on the periphery of the shaft head, a first step hole is formed in the inner half hub to form a first limiting step, and a second step hole is formed in the outer half hub to form a second limiting step;

the two axial sides of the inner bearing are respectively abutted with the first limiting step and the limiting protrusion, and the two axial sides of the outer bearing are respectively abutted with the second limiting step and the limiting protrusion.

Optionally, the limiting protrusion comprises an annular protrusion, the annular protrusion is arranged at one end of the shaft head, which is close to the axle housing body, and one axial side of the inner bearing is abutted with the annular protrusion;

the driving axle wheel end structure further comprises a first fastening piece, and the first fastening piece penetrates through the annular protrusion to be connected with the axle housing body so as to fix the shaft head and the axle housing body.

Optionally, the spacing arch still includes the profile of tooth arch, the profile of tooth is protruding to be set up annular arch is dorsad axle housing body's one side, one side of outer bearing with the protruding butt of profile of tooth, first fastener is by the tooth clearance on the profile of tooth arch passes the protruding setting of annular.

Optionally, the inner bearing and the outer bearing are both arranged as circle center roller bearings, and the inner bearing and the outer bearing are arranged face to face.

Optionally, the drive axle wheel end structure further comprises an oil seal, and the oil seal is arranged between the axle housing body and the inner half hub.

Optionally, the half shaft is provided with a spline shaft section, and the spline shaft section penetrates out of the shaft head;

the outer half wheel hub is internally provided with a spline hole, and the outer half wheel hub is sleeved on the spline shaft section through the spline hole.

Optionally, the drive axle wheel end structure further comprises a connecting plate, a second fastening piece and a third fastening piece, wherein the connecting plate is arranged on one side, opposite to the inner half wheel hub, of the outer half wheel hub, the second fastening piece penetrates through the connecting plate to be fixedly connected with the outer half wheel hub, and the third fastening piece penetrates through the connecting plate to be fixedly connected with the half shaft.

Optionally, the drive axle wheel end structure further includes:

the brake drum is sleeved on the inner half wheel hub and is positioned at one side of the inner half wheel hub, which is away from the outer half wheel hub;

the wheel bolt assembly comprises a wheel bolt and a wheel nut, and the wheel bolt sequentially penetrates through the brake drum, the inner half wheel hub, the outer half wheel hub and the wheel nut in threaded connection.

The invention also provides a vehicle comprising the drive axle wheel end structure.

The invention has the beneficial effects that:

the invention provides a drive axle wheel end structure and a vehicle, wherein a hub is divided into an inner half hub and an outer half hub, when the drive axle wheel end structure is assembled, an inner bearing can be firstly arranged between an axle housing body and the inner half hub, so that the radial fixing of the inner bearing is realized, and the inner half hub and a shaft head are respectively abutted with two axial sides of the inner bearing, so that the axial fixing of the inner bearing is realized; and then, the outer bearing can be arranged between the shaft head and the outer half wheel hub, so that the radial fixation of the outer bearing is realized, the shaft head and the outer half wheel hub are respectively abutted with two axial sides of the outer bearing, and the axial fixation of the outer bearing is realized.

Compared with the prior art, the driving axle wheel end structure can omit a lock nut structure when a bearing is fixed, so that the axial size of a shaft head is reduced, the whole weight of the driving axle is lightened, and the cost is reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a drive axle wheel end structure according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a shaft head in a driving axle wheel end structure according to an embodiment of the present invention;

FIG. 3 is a schematic view of an inner hub half of a drive axle wheel end structure according to an embodiment of the present invention;

FIG. 4 is a schematic view of an outer hub half in a drive axle wheel end structure according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a part of a half shaft in a driving axle wheel end structure according to an embodiment of the present invention.

In the figure:

1. a half shaft mechanism; 11. a half shaft; 111. a spline shaft section; 12. a axle housing body; 13. a shaft head; 131. a limit protrusion; 1311. an annular protrusion; 1312. tooth-shaped protrusions; 1313. backlash; 132. a first L-shaped ring groove; 2. an inner bearing; 3. an outer bearing;

4. a hub; 41. an inner hub half; 411. a first stepped hole; 412. a first limit step; 413. an oil seal mounting hole; 414. a first flange; 415. a second L-shaped ring groove; 416. a third L-shaped ring groove; 42. an outer hub half; 421. a second stepped hole; 422. a second limit step; 423. a spline hole; 424. a second flange;

5. a first fastener; 6. a gasket; 7. an oil seal; 8. a connecting plate; 9. a second fastener; 10. a third fastener; 20. a brake drum; 30. a wheel bolt assembly; 301. wheel bolts; 302. and a wheel nut.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the technical scheme of the invention is further described below by a specific embodiment in combination with the attached drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The present embodiment provides a transaxle wheel end structure, as shown in fig. 1-5, that includes a half shaft mechanism 1, a hub 4, and bearings. The axle shaft mechanism 1 comprises an axle shaft 11, an axle housing body 12 and an axle head 13, and the axle housing body 12 and the axle head 13 are sequentially sleeved on the axle shaft 11 from inside to outside along the axial direction of the axle shaft 11. The hub 4 comprises an inner half hub 41 and an outer half hub 42 which are detachably connected, and the inner half hub 41 and the outer half hub 42 are sequentially sleeved on the half shaft mechanism 1 from inside to outside along the axial direction of the half shaft mechanism 1. The bearing comprises an inner bearing 2 and an outer bearing 3, wherein the inner bearing 2 is arranged between the axle housing body 12 and the inner half hub 41, two axial sides of the inner bearing 2 are respectively abutted with the inner half hub 41 and the shaft head 13, the outer bearing 3 is arranged between the shaft head 13 and the outer half hub 42, and two axial sides of the outer bearing 3 are respectively abutted with the shaft head 13 and the outer half hub 42.

According to the arrangement, when assembling, the inner bearing 2 can be firstly arranged between the axle housing body 12 and the inner half hub 41, so that the radial fixation of the inner bearing 2 is realized, and the inner half hub 41 and the shaft head 13 are respectively abutted with two axial sides of the inner bearing 2, so that the axial fixation of the inner bearing 2 is realized; after that, the outer bearing 3 can be mounted between the shaft head 13 and the outer half hub 42, so as to realize radial fixation of the outer bearing 3, and the shaft head 13 and the outer half hub 42 are respectively abutted against two axial sides of the outer bearing 3, so as to realize axial fixation of the outer bearing 3. Compared with the prior art, the driving axle wheel end structure can omit a lock nut structure when a bearing is fixed, so that the axial size of the axle head 13 is reduced, the whole weight of the driving axle is lightened, and the cost is reduced.

Alternatively, as shown in fig. 1 and 2, a limiting protrusion 131 is provided on the outer circumference of the stub shaft 13, a first stepped hole 411 is provided in the inner hub half 41 to form a first limiting step 412, and a second stepped hole 421 is provided in the outer hub half 42 to form a second limiting step 422. The two axial sides of the inner bearing 2 are respectively abutted with the first limiting step 412 and the limiting bulge 131, and the two axial sides of the outer bearing 3 are respectively abutted with the second limiting step 422 and the limiting bulge 131. Overall, the structure is simple and compact, and the axial fixation of the inner bearing 2 and the outer bearing 3 can be well realized.

In this embodiment, as shown in fig. 1, the right side of the inner bearing 2 is abutted against the first limiting step 412, and the left side of the inner bearing 2 is abutted against the limiting protrusion 131; the right side of the outer bearing 3 is abutted with the limit protrusion 131, and the left side of the outer bearing 3 is abutted with the second limit step 422.

More specifically, as shown in fig. 2, the limit projection 131 includes an annular projection 1311, the annular projection 1311 being provided at an end of the stub shaft 13 near the axle housing body 12, one side in the axial direction of the inner bearing 2 (the left side of the inner bearing 2 in fig. 1) abutting against the annular projection 1311. The transaxle wheel end structure further includes a first fastener 5, the first fastener 5 being coupled to the axle housing body 12 through the annular protrusion 1311 to fix the stub shaft 13 and the axle housing body 12. At this time, the annular protrusion 1311 not only can limit the inner bearing 2, but also can allow the first fastener 5 to pass through to fix the axle head 13 and the axle housing body 12, so that the structure is simple.

In this embodiment, to ensure the connection stability between the axle head 13 and the axle housing body 12, a first L-shaped ring groove 132 is formed on the axle head 13 at a side of the annular protrusion 1311 facing the axle housing body 12, and the axle head 13 is sleeved with the axle housing body 12 through the first L-shaped ring groove 132, so as to ensure the installation accuracy and stability. More specifically, after the axle head 13 and the axle housing body 12 are sleeved, the left end face of the axle housing body 12 abuts against the right end face of the annular boss 1311.

Optionally, the limiting boss 131 further includes a toothed boss 1312, the toothed boss 1312 is disposed on a side of the annular boss 1311 facing away from the axle housing body 12, and a side of the outer bearing 3 (right side of the outer bearing 3 in fig. 1) abuts against the toothed boss 1312, and the first fastener 5 is disposed through the annular boss 1311 by a tooth gap 1313 on the toothed boss 1312. At this time, the tooth-shaped boss 1312 can limit the outer bearing 3, and can provide the tooth gap 1313 for the first fastener 5 to pass through, so that the structure is simple and the two-purpose.

In this embodiment, the first fastener 5 is a socket head cap screw and is provided in plurality. Correspondingly, a plurality of round holes are formed in the annular boss 1311 along the circumferential direction of the boss 1311, a plurality of threaded holes are formed in the axle housing body 12 along the circumferential direction of the boss, a plurality of socket head cap screws, a plurality of round holes and a plurality of threaded holes are arranged in a one-to-one correspondence mode, and the socket head cap screws penetrate through the round holes and the threaded holes to be in threaded connection, so that the connection between the axle head 13 and the axle housing body 12 is firmer.

Optionally, as shown in fig. 1, a spacer 6 is also provided between the outer bearing 3 and the toothed protrusion 1312. The gasket 6 is a ring plate structure sleeved on the shaft head 13 and is used for adjusting the axial position of the outer bearing 3.

With the specific type of bearing, the inner bearing 2 and the outer bearing 3 are both arranged as a center roller bearing, and the inner bearing 2 and the outer bearing 3 are arranged face to face (i.e., the small end face of the outer ring of the inner bearing 2 and the small end face of the outer ring of the outer bearing 3 are arranged opposite to each other). According to this, it is possible to ensure a sufficiently large contact area between the inner bearing 2 and the inner half hub 41 and between the inner bearing 2 and the stub shaft 13, and a sufficiently large contact area between the outer bearing 3 and the stub shaft 13 and between the outer bearing 3 and the outer half hub 42, effectively improving the stability of the installation of the inner bearing 2 and the outer bearing 3.

Specifically, taking fig. 1 as an example, the large end face of the outer ring of the inner bearing 2 is abutted against the first limit step 412, and the large end face of the inner ring of the inner bearing 2 is abutted against the annular protrusion 1311; the large end face of the outer ring of the outer bearing 3 is abutted with the second limiting step 422, and the large end face of the inner ring of the outer bearing 3 is abutted with the tooth-shaped boss 1312.

Next, other arrangements in the drive axle wheel end structure will be described.

Optionally, the transaxle wheel end structure further includes a brake drum 20 and a wheel bolt assembly 30. The brake drum 20 is sleeved on the inner half hub 41 and is positioned on one side of the inner half hub 41 facing away from the outer half hub 42. The wheel bolt assembly 30 comprises a wheel bolt 301 and a wheel nut 302, wherein the wheel bolt 301 sequentially penetrates through the brake drum 20, the inner half hub 41, the outer half hub 42 and the wheel nut 302 to be connected in a threaded manner, so that the fixed connection among the brake drum 20, the inner half hub 41 and the outer half hub 42 can be realized, and the structure is simple and compact. Since the structures of the wheel bolts 301 and the wheel nuts 302 are both prior art, the description thereof is omitted herein.

In this embodiment, as shown in fig. 1, 3 and 4, a first flange 414 is disposed on a side of the inner half hub 41 opposite to the outer half hub 42, a second flange 424 is disposed on a side of the outer half hub 42 opposite to the inner half hub 41, the first flange 414 and the second flange 424 are attached, and the wheel bolts 301 sequentially pass through the first flange 414 and the second flange 424 to enhance the connection stability of the inner half hub 41 and the outer half hub 42.

Further, a second L-shaped ring groove 415 and a third L-shaped ring groove 416 are formed on the inner half hub 41 at two axial sides of the first flange 414, respectively, the inner half hub 41 is sleeved with the brake drum 20 through the second L-shaped ring groove 415, and the inner half hub 41 is sleeved with the outer half hub 42 through the third L-shaped ring groove 416, so as to improve the installation accuracy and stability.

Optionally, as shown in fig. 1, the axle-wheel-end structure further includes an oil seal 7, and the oil seal 7 is disposed between the axle housing body 12 and the inner-half hub 41 to achieve sealing between the axle housing body 12 and the inner-half hub 41. In this embodiment, the inner hub 41 is provided with an oil seal mounting hole 413, the shaft diameter of the oil seal 7 is matched with the oil seal mounting hole 413, and the sealing lip of the oil seal 7 is matched with the shaft diameter of the axle housing body 12.

Alternatively, as shown in FIGS. 1 and 5, the axle shaft 11 has a splined shaft section 111, with the splined shaft section 111 disposed through the axle head 13. Correspondingly, a splined hole 423 is provided in the outer hub half 42, and the outer hub half 42 is sleeved on the splined shaft section 111 through the splined hole 423. According to this, can guarantee the circumference between semi-axis 11 and the outer half wheel hub 42 fixed, and then can make semi-axis 11 drive wheel hub 4 whole rotation through outer half wheel hub 42, guarantee wheel hub 4 normal operating. In addition, the above arrangement can reduce the weight of the structure as compared with the conventional half shaft 11.

Further, the drive axle wheel end structure further comprises a connecting plate 8, a second fastening piece 9 and a third fastening piece 10. As shown in fig. 1, the connecting plate 8 is disposed on a side of the outer half hub 42 facing away from the inner half hub 41, the second fastening member 9 is fixedly connected with the outer half hub 42 through the connecting plate 8, and the third fastening member 10 is fixedly connected with the half shaft 11 through the connecting plate 8, so that the outer half hub 42 and the half shaft 11 can be completely fixed together. In this embodiment, the connection plate 8 is a circular plate, the cover of which is disposed on the left side of the outer half hub 42, and a circular hole is formed in the connection plate 8 for the second fastening member 9 or the third fastening member 10 to pass through. The second fastener 9 and the third fastener 10 are bolts. The number, positions, etc. of the second fasteners 9 and the third fasteners 10 can be set according to actual needs, and will not be described herein.

The present embodiment also provides a vehicle including the transaxle wheel end structure as described above.

In summary, the present embodiment provides a driving axle wheel end structure and a vehicle, by dividing the hub 4 into an inner half hub 41 and an outer half hub 42, and disposing the limiting protrusion 131 on the axle head 13, the hub 4 and the axle shaft mechanism 1 can be directly matched to fix the inner bearing 2 and the outer bearing 3, thereby omitting the lock nut structure, reducing the axial dimension of the axle head 13, reducing the overall weight of the driving axle, and reducing the cost. At the same time, by arranging the outer bearing 3 and the inner bearing 2 face to face, structural stability can be ensured. Further, through the plug-in fit of the axle head 13 and the axle housing body 12 and the connection of the axle head 13 and the axle housing body 12 through the first fastener 5, the firm connection of the axle head 13 and the axle housing body 12 can be realized, and the welding is not needed, so that the time and the labor are saved.

The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.

Claims

1. A drive axle wheel end structure, comprising:

the axle housing body (12) and the axle head (13) are sleeved on the axle shaft (11) from inside to outside in sequence along the axial direction of the axle shaft (11);

the hub (4) comprises an inner half hub (41) and an outer half hub (42) which are detachably connected, and the inner half hub (41) and the outer half hub (42) are sequentially sleeved on the half shaft mechanism (1) from inside to outside along the axial direction of the half shaft mechanism (1);

the bearing comprises an inner bearing (2) and an outer bearing (3), wherein the inner bearing (2) is installed between the axle housing body (12) and the inner half hub (41), two axial sides of the inner bearing (2) are respectively abutted to the inner half hub (41) and the shaft head (13), the outer bearing (3) is installed between the shaft head (13) and the outer half hub (42), and two axial sides of the outer bearing (3) are respectively abutted to the shaft head (13) and the outer half hub (42).

2. The drive axle wheel end structure according to claim 1, wherein a limiting protrusion (131) is provided on the outer circumference of the axle head (13), a first step hole (411) is provided in the inner half hub (41) to form a first limiting step (412), and a second step hole (421) is provided in the outer half hub (42) to form a second limiting step (422);

the two axial sides of the inner bearing (2) are respectively abutted with the first limiting step (412) and the limiting bulge (131), and the two axial sides of the outer bearing (3) are respectively abutted with the second limiting step (422) and the limiting bulge (131).

3. The transaxle wheel end structure according to claim 2, characterized in that the limit projection (131) includes an annular projection (1311), the annular projection (1311) being provided at an end of the stub shaft (13) near the axle housing body (12), one side in the axial direction of the inner bearing (2) being abutted against the annular projection (1311);

the drive axle wheel end structure further comprises a first fastener (5), wherein the first fastener (5) penetrates through the annular protrusion (1311) to be connected with the axle housing body (12) so as to fix the shaft head (13) and the axle housing body (12).

4. A drive axle wheel end structure according to claim 3, characterized in that the limit projection (131) further comprises a tooth-shaped projection (1312), the tooth-shaped projection (1312) is arranged on the side of the annular projection (1311) facing away from the axle housing body (12), one side of the outer bearing (3) is abutted against the tooth-shaped projection (1312), and the first fastening piece (5) is arranged by a tooth gap (1313) on the tooth-shaped projection (1312) passing through the annular projection (1311).

5. A drive axle wheel end structure according to any one of claims 2-4, characterized in that the inner bearing (2) and the outer bearing (3) are both arranged as centre roller bearings and that the inner bearing (2) and the outer bearing (3) are arranged face to face.

6. The transaxle wheel end structure according to claim 1, further comprising an oil seal (7), the oil seal (7) being provided between the axle housing body (12) and the inner half hub (41).

7. The drive axle wheel end structure according to claim 1, characterized in that the half axle (11) has a splined shaft section (111), which splined shaft section (111) is arranged through the axle head (13);

a spline hole (423) is formed in the outer half hub (42), and the outer half hub (42) is sleeved on the spline shaft section (111) through the spline hole (423).

8. The drive axle wheel end structure according to claim 7, further comprising a connecting plate (8), a second fastening member (9) and a third fastening member (10), wherein the connecting plate (8) is arranged on one side of the outer half hub (42) facing away from the inner half hub (41), the second fastening member (9) penetrates through the connecting plate (8) to be fixedly connected with the outer half hub (42), and the third fastening member (10) penetrates through the connecting plate (8) to be fixedly connected with the half shaft (11).

9. The drive axle wheel end structure of claim 1, further comprising:

the brake drum (20) is sleeved on the inner half wheel hub (41) and is positioned at one side of the inner half wheel hub (41) opposite to the outer half wheel hub (42);

the wheel bolt assembly (30) comprises a wheel bolt (301) and a wheel nut (302), wherein the wheel bolt (301) sequentially penetrates through the brake drum (20), the inner half hub (41), the outer half hub (42) and the wheel nut (302) in a threaded connection mode.

10. A vehicle comprising a transaxle wheel end structure as claimed in any one of claims 1 to 9.