阅读说明：本技术 一种驱动桥轮端结构及车辆 (Drive axle wheel end structure and vehicle ) 是由 冯涛 牛湛滔 王俊豪 于 2021-09-13 设计创作，主要内容包括：本发明公开了一种驱动桥轮端结构及车辆,涉及汽车车桥技术领域。该驱动桥轮端结构包括：半轴机构,包括半轴、桥壳本体和轴头,沿半轴的轴向,桥壳本体和轴头由内向外依次套设在半轴上；轮毂,包括可拆卸连接的内半轮毂和外半轮毂,沿半轴机构的轴向,内半轮毂和外半轮毂由内向外依次套设在半轴机构上；轴承,包括内轴承和外轴承,内轴承安装在桥壳本体和内半轮毂之间,内轴承的轴向的两侧分别与内半轮毂和轴头抵接,外轴承安装在轴头和外半轮毂之间,外轴承的轴向的两侧分别与轴头和外半轮毂抵接。本发明能够减小轴头的轴向尺寸,减轻驱动桥整体重量,降低成本。(The invention discloses a drive 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 half axle from inside to outside along the axial direction of the half axle; the wheel hub comprises an inner half wheel hub and an outer half wheel hub which are detachably connected, and the inner half wheel hub and the outer half wheel hub are sequentially sleeved on the half shaft mechanism from inside to outside along the axial direction of the half shaft mechanism; the bearing, including inner bearing and outer bearing, the inner bearing is installed between axle housing body and interior half wheel hub, the axial both sides of inner bearing respectively with interior half wheel hub and spindle nose butt, the outer bearing is installed between spindle nose and outer half wheel hub, the axial both sides of outer bearing respectively with spindle nose and outer half wheel hub butt. The invention can reduce the axial size of the shaft head, reduce the whole weight of the drive axle and reduce the cost.)

1. A drive axle wheel end structure, comprising:

the half-shaft mechanism (1) comprises a half shaft (11), an axle housing body (12) and a shaft head (13), wherein the axle housing body (12) and the shaft head (13) are sequentially sleeved on the half shaft (11) from inside to outside along the axial direction of the half shaft (11);

the wheel hub (4) comprises an inner half wheel hub (41) and an outer half wheel hub (42) which are detachably connected, and the inner half wheel hub (41) and the outer half wheel 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, including inner bearing (2) and outer bearing (3), inner bearing (2) are installed axle housing body (12) with between interior half wheel hub (41), the axial both sides of inner bearing (2) respectively with interior half wheel hub (41) with spindle nose (13) butt, outer bearing (3) are installed spindle nose (13) with between outer half wheel hub (42), the axial both sides of outer bearing (3) respectively with spindle nose (13) with outer half wheel hub (42) butt.

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

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

3. The drive axle wheel end structure according to claim 2, characterized in that the limit projection (131) comprises an annular projection (1311), the annular projection (1311) is arranged at one end of the axle head (13) close to the axle housing body (12), and one axial side of the inner bearing (2) abuts 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 bulge (1311) and the axle housing body (12) to fix the shaft head (13) and the axle housing body (12).

4. The 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 provided on a side of the annular projection (1311) facing away from the axle housing body (12), a side of the outer bearing (3) abuts against the tooth-shaped projection (1312), and the first fastening member (5) is provided through the annular projection (1311) by a backlash (1313) in the tooth-shaped projection (1312).

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

6. The drive axle wheel end structure according to claim 1, characterized in that it further comprises an oil seal (7), said oil seal (7) being disposed between said axle housing body (12) and said inner hub half (41).

7. The drive axle wheel end construction according to claim 1, characterized in that the axle shaft (11) has a splined shaft section (111), the splined shaft section (111) being 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 axle wheel end structure according to claim 7, characterized in that it further comprises a connecting plate (8), a second fastener (9) and a third fastener (10), said connecting plate (8) being arranged on the side of said outer half-hub (42) facing away from said inner half-hub (41), said second fastener (9) being fixedly connected to said outer half-hub (42) through said connecting plate (8), said third fastener (10) being fixedly connected to said half-shaft (11) through said connecting plate (8).

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

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

wheel bolt subassembly (30), including wheel bolt (301) and wheel nut (302), wheel bolt (301) pass in proper order brake drum (20), interior half wheel hub (41) outer half wheel hub (42) with wheel nut (302) threaded connection.

10. A vehicle comprising a drive axle wheel end structure according to any one of claims 1 to 9.

Technical Field

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

Background

For a drive axle used by a vehicle at present, a shaft head is arranged at the wheel end of the drive axle, and a bearing and a wheel hub are sequentially sleeved outside the shaft head. Meanwhile, the outer end of the shaft head is also provided with a locking nut structure for fixing the bearing. However, this construction results in a large axial dimension of the stub shaft, and an overall high weight and cost of the transaxle.

Accordingly, there is a need for a drive axle wheel end structure and vehicle that solves the above problems.

Disclosure of Invention

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

In order 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 half shaft from inside to outside along the axial direction of the half shaft;

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

the bearing, including inner bearing and outer bearing, the inner bearing is installed the axle housing body with between the half wheel hub in, the axial both sides of inner bearing respectively with half wheel hub in with the spindle nose butt, the outer bearing is installed the spindle nose with between the half wheel hub outward, the axial both sides of outer bearing respectively with the spindle nose with half wheel hub butt outward.

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

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

the drive axle wheel end structure still includes first fastener, first fastener passes annular arch with this body coupling of axle housing, in order to fix the spindle nose with this body coupling of axle housing.

Optionally, spacing arch still includes the profile of tooth arch, the profile of tooth arch sets up annular arch dorsad one side of axle housing body, one side of outer bearing with the protruding butt of profile of tooth, first fastener by the tooth clearance on the profile of tooth arch passes annular arch sets up.

Optionally, the inner bearing and the outer bearing are both arranged as a circular center roller bearing, 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 has a splined shaft section disposed through the axle head;

and a spline hole is formed in the outer half hub, and the outer half hub is sleeved on the spline shaft section through the spline hole.

Optionally, the drive axle wheel end structure further includes a connecting plate, a second fastener and a third fastener, the connecting plate is disposed on a side of the outer half hub facing away from the inner half hub, the second fastener passes through the connecting plate and is fixedly connected with the outer half hub, and the third fastener passes through the connecting plate and is fixedly connected with the half shaft.

Optionally, the drive axle wheel end structure further comprises:

the brake drum is sleeved on the inner half wheel hub and is positioned on one side, back to the outer half wheel hub, of the inner half wheel hub;

the wheel bolt assembly comprises a wheel bolt and a wheel nut, wherein 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 a drive axle wheel end structure as described above.

The invention has the beneficial effects that:

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

On the whole, compared with the prior art, the structure of the wheel end of the drive axle can save a lock nut structure when a bearing is fixed, thereby reducing the axial size of the shaft head, lightening the whole weight of the drive axle and reducing the cost.

Drawings

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

FIG. 2 is a schematic diagram illustrating the construction of the axle head in the wheel end construction of the transaxle according to the embodiment of the present invention;

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

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

FIG. 5 is a schematic diagram of a portion of the axle shaft in a wheel end configuration of a drive axle according to an embodiment of the present invention.

In the figure:

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

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

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

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The present embodiment provides a drive axle wheel end structure, as shown in fig. 1 to 5, which includes a half-axle mechanism 1, a hub 4, and a bearing. The half-axle mechanism 1 comprises a half axle 11, an axle housing body 12 and an axle head 13, wherein the axle housing body 12 and the axle head 13 are sequentially sleeved on the half axle 11 from inside to outside along the axial direction of the half axle 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 includes inner bearing 2 and outer bearing 3, and inner bearing 2 installs between axle housing body 12 and interior half wheel hub 41, and inner bearing 2's axial both sides respectively with interior half wheel hub 41 and spindle nose 13 butt, and outer bearing 3 installs between spindle nose 13 and outer half wheel hub 42, outer bearing 3's axial both sides respectively with spindle nose 13 and outer half wheel hub 42 butt.

According to the arrangement, when the axle housing is assembled, the inner bearing 2 can be firstly installed between the axle housing body 12 and the inner half hub 41, so that the radial fixation of the inner bearing 2 is realized, the inner half hub 41 and the shaft head 13 are respectively abutted against two axial sides of the inner bearing 2, and the axial fixation of the inner bearing 2 is realized; then, the outer bearing 3 may be installed between the spindle head 13 and the outer half hub 42 to radially fix the outer bearing 3, and the spindle head 13 and the outer half hub 42 are respectively abutted against both sides of the outer bearing 3 in the axial direction to axially fix the outer bearing 3. On the whole, compared with the prior art, the wheel end structure of the drive axle can save a lock nut structure when a bearing is fixed, thereby reducing the axial size of the shaft head 13, lightening the whole weight of the drive axle and reducing the cost.

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

In the present embodiment, as shown in fig. 1, the right side of the inner bearing 2 abuts against the first limit step 412, and the left side of the inner bearing 2 abuts against the limit projection 131; the right side of the outer bearing 3 is abutted with the limit bulge 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 stopper projection 131 includes an annular projection 1311, the annular projection 1311 is provided at one end of the spindle head 13 near the axle housing body 12, and one side in the axial direction of the inner bearing 2 (the left side of the inner bearing 2 in fig. 1) abuts against the annular projection 1311. The drive axle wheel end structure further includes a first fastener 5, the first fastener 5 being connected to the axle housing body 12 through the annular boss 1311 to secure the axle head 13 and the axle housing body 12. At this moment, annular arch 1311 both can carry out spacingly to inner bearing 2, can supply again that first fastener 5 passes in order to fix spindle nose 13 and axle housing body 12, and is integrative dual-purpose, simple structure.

In this embodiment, in order to ensure the stability of the connection between the spindle head 13 and the axle housing body 12, a first L-shaped annular groove 132 is formed on the spindle head 13 on one side of the annular protrusion 1311 facing the axle housing body 12, and the spindle head 13 is sleeved with the axle housing body 12 through the first L-shaped annular groove 132, so as to ensure the installation accuracy and stability. More specifically, after the spindle 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 limit projection 131 further includes a tooth-shaped projection 1312, the tooth-shaped projection 1312 is disposed on a side of the annular projection 1311 facing away from the axle housing body 12, one side of the outer bearing 3 (the right side of the outer bearing 3 in fig. 1) abuts against the tooth-shaped projection 1312, and the first fastening member 5 is disposed through the annular projection 1311 by a tooth gap 1313 on the tooth-shaped projection 1312. At this time, the tooth-shaped protrusion 1312 can limit the position of the outer bearing 3 and also can provide a tooth space 1313 for the first fastening piece 5 to pass through, so that the two-purpose structure is integrated and has a simple structure.

In the present embodiment, the first fastening member 5 is a socket head cap screw and is provided in plurality. Correspondingly, be provided with a plurality of round holes along self circumference on the annular arch 1311, be provided with a plurality of screw holes along self circumference on the axle housing body 12, a plurality of socket head cap screws, a plurality of round holes and the equal one-to-one setting of a plurality of screw holes, socket head cap screw pass round hole and screw hole threaded connection to make the connection of spindle nose 13 and axle housing body 12 more firm.

Optionally, as shown in fig. 1, a spacer 6 is further 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 used for adjusting the axial position of the outer bearing 3.

Regarding the specific type of bearing, the inner bearing 2 and the outer bearing 3 are both configured as circular roller bearings, and the inner bearing 2 and the outer bearing 3 are disposed in a face-to-face manner (i.e., the small end surface of the outer ring of the inner bearing 2 and the small end surface of the outer ring of the outer bearing 3 are disposed opposite to each other). According to this, can guarantee to have enough big butt area between inner bearing 2 and the interior half wheel hub 41 and between inner bearing 2 and the spindle nose 13 to guarantee to have enough big butt area between outer bearing 3 and the spindle nose 13 and between outer bearing 3 and the outer half wheel hub 42, effectively improve the steadiness of inner bearing 2 and the installation of outer bearing 3.

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

Other arrangements in the axle wheel end configuration will be described below.

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 located on a side of the inner half hub 41, which is opposite to the outer half hub 42. The wheel bolt assembly 30 comprises a wheel bolt 301 and a wheel nut 302, 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 in threaded connection, 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 bolt 301 and the wheel nut 302 are prior art, they will not be described in detail herein.

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

Further, a second L-shaped ring groove 415 and a third L-shaped ring groove 416 are respectively formed on the inner half hub 41 on both sides of the first flange 414 in the axial direction, 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 that the mounting accuracy and stability are improved.

Optionally, as shown in fig. 1, the drive 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 half 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 seal 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 stub shaft 13. Correspondingly, a spline hole 423 is provided in the outer hub half 42, and the outer hub half 42 is sleeved on the spline shaft section 111 through the spline hole 423. Therefore, the circumferential fixation between the half shaft 11 and the outer half hub 42 can be ensured, and the half shaft 11 can drive the hub 4 to integrally rotate through the outer half hub 42, so that the normal work of the hub 4 is ensured. Furthermore, the structural weight can be reduced by the above arrangement as compared with the conventional half shaft 11 type structure.

Further, the drive axle wheel end structure further comprises a connecting plate 8, a second fastening member 9 and a third fastening member 10. As shown in fig. 1, the connecting plate 8 is disposed on a side of the outer hub half 42 facing away from the inner hub half 41, the second fastening member 9 is fixedly connected to the outer hub half 42 through the connecting plate 8, and the third fastening member 10 is fixedly connected to the axle shaft 11 through the connecting plate 8, so that the outer hub half 42 and the axle shaft 11 can be completely fixed together. In this embodiment, the connecting plate 8 is a circular plate, and covers the left side of the outer hub half 42, and a circular hole is provided on the connecting 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 both bolts. The number, the positions, and the like of the second fastening members 9 and the third fastening members 10 can be set according to actual needs, and are not described in detail herein.

The present embodiments also provide a vehicle that includes a drive axle wheel end structure as described above.

In conclusion, the embodiment provides a transaxle wheel end structure and vehicle, through being divided into interior half wheel hub 41 and outer half wheel hub 42 with wheel hub 4 to set up spacing arch 131 on spindle nose 13, can make wheel hub 4 and half-axle mechanism 1 direct fit with fixed inner bearing 2 and outer bearing 3, thereby save the lock nut structure, reduce the axial dimensions of spindle nose 13, alleviate the whole weight of transaxle, reduce cost. Meanwhile, by having the outer bearing 3 and the inner bearing 2 disposed face to face, structural stability can be ensured. Further, through making spindle nose 13 and axle housing body 12 the cooperation of pegging graft to connect the two through first fastener 5, can realize spindle nose 13 and axle housing body 12's firm connection, need not to weld labour saving and time saving.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.