CN114838104A

CN114838104A - Speed reducer assembly and automobile axle

Info

Publication number: CN114838104A
Application number: CN202210414767.3A
Authority: CN
Inventors: 冯涛; 王浩
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2022-04-15
Filing date: 2022-04-15
Publication date: 2022-08-02

Abstract

The invention belongs to the technical field of automobile axles and discloses a speed reducer assembly and an automobile axle, wherein the speed reducer assembly comprises a speed reducer shell, and an upper opening and a lower opening are sequentially arranged along a first axis; the driving bevel gear is arranged in the reducer shell along the first axis, and the lower end of the driving bevel gear is provided with a guide post and an annular groove annularly arranged outside the guide post; the bearing seat is connected with the lower opening of the speed reducer shell, and an installation part is arranged on the bearing seat; and the guide bearing is arranged in the mounting part along the first axis, the mounting part extends into the annular groove, and the guide bearing is sleeved on the guide column. The lower extreme of drive bevel gear sets up guide post and ring channel, and the installation department of bearing frame extends to in the ring channel, and during the guide post was located to the direction bearing housing, drive bevel gear received the direction of guide bearing, effectively solved the not enough problem of guide bearing arrangement space and improved drive bevel gear's transmission reliability.

Description

Speed reducer assembly and automobile axle

Technical Field

The invention relates to the technical field of automobile axles, in particular to a speed reducer assembly and an automobile axle.

Background

In the domestic automobile drive axle, two single-row tapered roller bearings are adopted to connect the drive bevel gear and the reducer shell, and the axial span of the two single-row tapered roller bearings is large, so that the weight and the cost of the reducer shell are increased. Meanwhile, the bearing of the driving bevel gear adopts a cantilever type structure, and the reliability is relatively low. If a common straddle type structure is adopted, the arrangement space of the guide bearing is limited.

Disclosure of Invention

The invention aims to provide a speed reducer assembly and an automobile axle, which meet the requirement of light weight, and have the advantages of good reliability and low cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, a speed reducer assembly includes:

the speed reducer shell is provided with an upper opening and a lower opening in sequence along the first axis;

the driving bevel gear is arranged in the reducer shell along the first axis, and the lower end of the driving bevel gear is provided with a guide post and an annular groove annularly arranged outside the guide post;

the bearing seat is connected with the lower opening of the speed reducer shell, and an installation part is arranged on the bearing seat; and

a guide bearing disposed in the mounting portion along the first axis, wherein:

the installation department extends to in the ring channel, the direction bearing housing is located on the guide post.

As the preferable scheme of the above speed reducer assembly, the bearing seat comprises a first seat body and a second seat body which are connected at an included angle, the first seat body is connected with the speed reducer shell, and the second seat body is sequentially provided with the differential bearing and the first adjusting ring along the second axis.

As a preferable scheme of the above speed reducer assembly, the first seat body is provided with the mounting portion and a connecting hole for connecting a lower opening of the speed reducer case;

the second seat body is provided with a threaded hole and a round hole which are sequentially arranged along the second axis, the first adjusting ring is in threaded connection with the threaded hole, and the differential bearing is arranged in the round hole in a limiting mode.

As a preferred embodiment of the above speed reducer assembly, the bottom of the mounting portion is provided with an inclined plane for abdicating the differential assembly, and the inclined plane extends downward and gradually approaches the second seat body.

As a preferable aspect of the above-described speed reducer assembly, the speed reducer assembly further includes:

and the double-row tapered roller bearing is arranged in the speed reducer shell along the first axis, and the spline shaft of the drive bevel gear is arranged in a central hole of the double-row tapered roller bearing.

the second adjusting ring is arranged on the first step surface of the upper opening and is attached to the end surface of the outer diameter surface of the axial first end of the double-row tapered roller bearing;

and the flange disc is sleeved on the spline shaft of the driving bevel gear and is attached to the end face of the inner diameter surface of the first axial end of the double-row tapered roller bearing, and the flange disc is arranged on the inner side of the second adjusting ring.

and the adjusting gasket is arranged on a second step surface in the speed reducer shell in a limiting mode and is used for being abutted to the axial second end of the double-row tapered roller bearing.

As a preferable scheme of the above speed reducer assembly, an oil seal is connected to an inner side of the second adjusting ring, and a seal lip of the oil seal is in sealing connection with an outer peripheral surface of the flange.

and the locking part is in threaded connection with the spline shaft of the driving bevel gear and fixes the flange plate along the axial direction.

In a second aspect, an automotive axle includes the above-described retarder assembly.

The invention has the beneficial effects that:

for the reducer assembly, the lower end of the driving bevel gear is provided with a guide post and an annular groove, the mounting part of the bearing seat extends into the annular groove, the guide bearing is sleeved in the guide post, and the driving bevel gear is guided by the guide bearing, so that the problem that the arrangement space of the guide bearing is insufficient is effectively solved, and the transmission reliability of the driving bevel gear is improved.

For an automobile axle, the lower end of the driving bevel gear is provided with a guide post and an annular groove, the mounting part of the bearing seat extends into the annular groove, the guide bearing is sleeved in the guide post, and the driving bevel gear is guided by the guide bearing, so that the problem that the arrangement space of the guide bearing is insufficient is effectively solved, and the transmission reliability of the driving bevel gear is improved.

Drawings

FIG. 1 is a schematic structural diagram of a retarder assembly provided in an embodiment of the present application;

FIG. 2 is a schematic illustration of the drive bevel gear of the retarder assembly shown in FIG. 1;

FIG. 3 is a schematic view of a bearing seat of the retarder assembly shown in FIG. 1;

FIG. 4 is an enlarged view of the circled portion A of FIG. 1;

fig. 5 is a schematic view of a second adjusting ring in the reducer assembly shown in fig. 1.

In the figure:

1-a speed reducer housing; 2-a drive bevel gear; 21-a guide post; 22-an annular groove; 3-adjusting the spacer; 4-a first adjusting ring; 5-a second adjusting ring; 51-an annular groove; 6-oil sealing; 7-a locking member; 8-flange plate; 9-differential bearings; 10-driven bevel gear; 11-a bolt; 12-a bearing seat; 121-a mounting portion; 122-connecting hole; 123-a threaded hole; 124-round holes; 125-inclined plane; 13-a guide bearing; 14-double row tapered roller bearing.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably 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 in specific cases to those skilled in the art.

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", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular 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 be limiting.

The present invention provides a reducer assembly, as shown in fig. 1, which includes a reducer case 1, a drive bevel gear 2, a bearing housing 12, and a guide bearing 13.

The speed reducer case 1 has a case structure, and an accommodating cavity is provided in the case structure, and the speed reducer case 1 is provided with an upper opening and a lower opening along the first axis L1 in sequence, which can be understood as an accommodating cavity between the upper opening and the lower opening of the speed reducer case 1.

As shown in fig. 2, the drive bevel gear 2 is disposed in the reducer case 1 along a first axis, a bevel end of the drive bevel gear 2 is engaged with a bevel end of the driven bevel gear 10, and a lower end of the drive bevel gear 2 is provided with a guide post 21 and an annular groove 22 annularly disposed outside the guide post 21. Wherein the guide post 21 extends along a first axis L1.

As shown in fig. 1, the inner diameter of the annular groove 22 is gradually reduced from bottom to top, so that the drive bevel gear 2 is conveniently fitted with a component at the lower end thereof, and can be gradually radially aligned during installation.

The bearing housing 12 is connected to the lower opening of the speed reducer case 1 by a bolt 11, and the bearing housing 12 is provided with a mounting portion 121. The guide bearing 13 is disposed in the mounting portion 121 along the first axis L1, the mounting portion 121 extends into the annular groove 22, and the guide bearing 13 is sleeved on the guide post 21.

For the reducer assembly provided by the embodiment, the lower end of the drive bevel gear 2 is provided with the guide post 21 and the annular groove 22, the mounting part 121 of the bearing seat 12 extends into the annular groove 22, the guide bearing 13 is sleeved in the guide post 21 and accommodated in the annular groove 22, and the drive bevel gear 2 is guided by the guide bearing 13, so that the problem of insufficient arrangement space of the guide bearing 13 is effectively solved, and the transmission reliability of the drive bevel gear 2 is improved.

As shown in fig. 3, the bearing seat 12 includes a first seat body and a second seat body connected at an included angle, the first seat body is connected to the reducer case 1, and the second seat body is sequentially provided with the differential bearing 9 and the first adjusting ring 4 along the second axis L2.

In this embodiment, the first seat and the second seat are 90 °, and the second axis L2 extends along the horizontal direction.

The first base is provided with a mounting portion 121 and four connecting limbs for connecting with a lower opening of the speed reducer case 1, the four connecting limbs extend in different directions, each connecting limb is provided with a connecting hole 122, and the connecting holes 122 are connected with bolts 11 in a one-to-one correspondence manner.

The second seat body is provided with a threaded hole 123 and a round hole 124 which are sequentially arranged along a second axis L2, the inner diameters of the threaded hole 123 and the round hole 124 are different, a step surface is formed between the threaded hole 123 and the round hole 124, the first adjusting ring 4 is in threaded connection in the threaded hole 123, the differential bearing 9 is limited and arranged in the round hole 124, and the differential bearing 9 is limited in both directions along the radial direction and the axial direction.

Further, the bottom of the mounting portion 121 is provided with an inclined plane 125 for giving way to the differential assembly, and the inclined plane 125 extends downward and gradually approaches the second seat body. The bottom of the mounting portion 121 is provided with an inclined plane 125 to avoid interference with the differential assembly.

With continued reference to fig. 1, the reduction gear assembly further includes a double row tapered roller bearing 14, the double row tapered roller bearing 14 being disposed in the reduction gear case 1 along the first axis L1, the spline shaft of the drive bevel gear being disposed in the center hole of the double row tapered roller bearing 14.

The double-row tapered roller bearing 14 is adopted to replace two original single-row tapered roller bearings to form a reducer structure, so that the weight of the reducer is reduced, and the requirement of light weight is met. Meanwhile, the double-row tapered roller bearing 14 integrates two single-row tapered roller bearings, the double-row tapered roller bearing 14 is of an integral structure, the influence of coaxiality and assembly precision of the two single-row tapered roller bearings is avoided, the service performance of the bearing is improved, the service life of the double-row tapered roller bearing 14 is prolonged, and therefore transmission reliability is improved.

The reducer assembly further comprises a second adjusting ring 5, the second adjusting ring 5 is arranged on a first step surface of the upper opening, and the second adjusting ring 5 is attached to the end face of the outer diameter surface of the axial first end of the double-row tapered roller bearing 14. In this embodiment, the second adjusting ring 5 is screwed to the first step surface, and the second adjusting ring 5 can axially limit the double-row tapered roller bearing 14 after being fixed.

The second adjusting ring 5 is abutted against the end face of the double-row tapered roller bearing 14 by adjusting the screwing depth of the second adjusting ring 5 into the first step face of the upper opening, so that the limit of the top end face of the double-row tapered roller bearing 14 is further ensured.

As shown in fig. 4, the reducer assembly further includes a flange 8, the flange 8 is spline-fitted to the spline shaft of the drive bevel gear 2 and is fitted to the end surface of the axial first end inner diameter surface of the double-row tapered roller bearing 14, and the flange 8 is disposed inside the second adjusting ring 5.

The speed reducer assembly further comprises an adjusting shim 3, the adjusting shim 3 limits a second step surface arranged in the speed reducer shell 1, and it can be understood that the adjusting shim 3 is limited by the second step surface of the speed reducer shell 1 in the axial direction and the radial direction, and the adjusting shim 3 is used for abutting against the second end of the double-row tapered roller bearing 14 in the axial direction.

The oil blanket 6 is connected to the inboard of second adjusting ring 5, and the sealed cover of oil blanket 6 is located on flange 8, and is sealed effectual, reduces the risk that lubricating oil revealed. Preferably, the seal lip of the oil seal 6 is sealingly connected to the outer peripheral surface of the flange 8, further improving the sealing property between the oil seal 6 and the flange 8.

As shown in fig. 5, an annular groove 51 is provided on a side of the second adjustment ring 5 adjacent to the double row tapered roller bearing 14, and an oil passage is formed between the annular groove 51 and the double row tapered roller bearing 14. The annular grooves 51 distributed annularly are adopted to facilitate the outflow of the lubricating oil in the double-row tapered roller bearing 14.

Further, the reducer assembly also comprises a locking member 7, and the locking member 7 is in threaded connection with the spline shaft of the drive bevel gear 2 and fixes the flange plate 8 in the axial direction. In this embodiment, the locking member 7 is a nut.

The embodiment also provides an automobile axle comprising the speed reducer assembly.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A retarder assembly, comprising:

the speed reducer comprises a speed reducer shell (1) which is sequentially provided with an upper opening and a lower opening along a first axis;

the driving bevel gear (2) is arranged in the speed reducer shell (1) along the first axis, and the lower end of the driving bevel gear is provided with a guide post (21) and an annular groove (22) annularly arranged outside the guide post (21);

the bearing seat (12) is connected with the lower opening of the speed reducer shell (1), and an installation part (121) is arranged on the bearing seat (12); and

a guide bearing (13) disposed in the mounting portion (121) along the first axis, wherein:

the mounting part (121) extends into the annular groove (22), and the guide column (21) is sleeved with the guide bearing (13).

2. Reducer assembly according to claim 1, characterised in that the bearing seat (12) comprises a first seat and a second seat, connected at an included angle, the first seat being connected to the reducer casing (1), the second seat being provided in succession, along a second axis, with a differential bearing (9) and a first adjusting ring (4).

3. A reducer assembly according to claim 2, wherein the first seat is provided with the mounting portion (121) and a connecting hole (122) for connecting a lower opening of the reducer case (1);

the second seat body is provided with a threaded hole (123) and a round hole (124) which are sequentially arranged along the second axis, the first adjusting ring (4) is in threaded connection with the threaded hole (123), and the differential bearing (9) is arranged in the round hole (124) in a limiting mode.

4. The reducer assembly according to claim 3, wherein the bottom of the mounting portion (121) is provided with a bevel (125) for giving way to the differential assembly, and the bevel (125) extends downward and gradually approaches the second seat.

5. The retarder assembly of claim 4, further comprising:

a double row tapered roller bearing (14) provided in the reducer case (1) along the first axis, and a spline shaft of the drive bevel gear (2) is provided in a center hole of the double row tapered roller bearing (14).

6. The retarder assembly of claim 5, further comprising:

the second adjusting ring (5) is arranged on the first step surface of the upper opening, and the second adjusting ring (5) is attached to the end surface of the outer diameter surface of the axial first end of the double-row tapered roller bearing (14);

and the flange plate (8) is in spline fit with a spline shaft of the driving bevel gear (2) and is attached to the end face of the axial first end inner diameter surface of the double-row tapered roller bearing (14), and the flange plate (8) is arranged on the inner side of the second adjusting ring (5).

7. The retarder assembly of claim 6, further comprising:

and the adjusting gasket (3) is limited to be arranged on a second step surface in the speed reducer shell (1), and the adjusting gasket (3) is used for being abutted to the axial second end of the double-row tapered roller bearing (14).

8. A retarder assembly according to claim 6, characterised in that the inner side of the second adjusting ring (5) is connected with an oil seal (6), the sealing lip of the oil seal (6) being in sealing connection with the outer peripheral surface of the flange plate (8).

9. The retarder assembly of claim 6, further comprising:

and the locking piece (7) is in threaded connection with the spline shaft of the driving bevel gear (2) and fixes the flange disc (8) along the axial direction.

10. An automotive axle, comprising a retarder assembly according to any one of claims 1-9.