CN215634800U

CN215634800U - Differential mechanism assembly and drive axle

Info

Publication number: CN215634800U
Application number: CN202122332046.1U
Authority: CN
Inventors: 冯涛; 张中波; 梁银银
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-01-25
Anticipated expiration: 2031-09-26

Abstract

The utility model belongs to the technical field of automobile axles and discloses a differential mechanism assembly and a drive axle. This differential mechanism assembly includes: the driven bevel gear is internally provided with an arc groove and a ring groove which are communicated with each other, and the driven bevel gear is provided with a round hole along the axial direction; the differential left shell is partially arranged in a driven bevel gear, a plurality of arc-shaped blocks are arranged on the outer wall of the differential left shell close to one side of the driven bevel gear, the arc-shaped blocks are arranged in a plurality of arc grooves in a one-to-one correspondence mode and used for circumferential limiting of the differential left shell, an annular boss is arranged on the outer wall of the end face of the differential left shell, the annular boss is arranged in an annular groove and used for axial limiting of the differential left shell, and a connecting hole is formed in the differential left shell corresponding to the circular hole; a threaded hole is formed in the cross shaft corresponding to the round hole; and the connecting piece is respectively penetrated through the connecting hole, the round hole and the threaded hole. According to the differential assembly, a threaded hole does not need to be machined in the driven bevel gear, and machining cost is reduced.

Description

Differential mechanism assembly and drive axle

Technical Field

The utility model relates to the technical field of automobile axles, in particular to a differential mechanism assembly and a drive axle.

Background

In order to ensure that the drive axle assembly can realize the differential speed of the left wheel and the right wheel in the whole vehicle running process, a differential assembly needs to be arranged in a speed reducer assembly under the normal condition, so that the differential speed of the left wheel and the right wheel can be realized according to the difference of road conditions in the whole vehicle running process.

In the existing automobile drive axle, a driven bevel gear is connected with a differential shell through bolts, threaded holes are distributed in the driven bevel gear, and round holes are distributed in the differential shell. By adopting the structure, a plurality of threaded holes are required to be processed on the driven bevel gear, the processing cost is higher, and due to the arrangement of the threaded holes and the round holes, the material cost and the assembly cost of the driven bevel gear and the bolt are increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a differential mechanism assembly and a drive axle, which have compact structure and light overall weight and improve the space utilization rate.

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

a differential assembly, comprising:

the bevel gear comprises a driven bevel gear, wherein arc grooves and ring grooves which are communicated with each other are arranged in the driven bevel gear, the arc grooves are uniformly arranged along the circumferential direction of the driven bevel gear, and a round hole is formed in the driven bevel gear along the axial direction of the driven bevel gear;

the differential left shell is partially arranged in the driven bevel gear, a plurality of arc-shaped blocks are arranged on the outer wall of the differential left shell close to one side of the driven bevel gear, the arc-shaped blocks are arranged in the arc-shaped grooves in a one-to-one correspondence mode and used for circumferential limiting of the differential left shell, an annular boss is arranged on the outer wall of the end face of the differential left shell and arranged in the annular groove and used for axial limiting of the differential left shell, and a connecting hole is formed in the differential left shell corresponding to the round hole;

the differential right shell is connected to the differential left shell, and a cavity is formed between the differential left shell and the differential right shell;

the planetary gear and the half shaft gear are arranged in the cavity, and the planetary gear and the half shaft gear are meshed with each other;

the cross shaft is respectively arranged in the planetary gear and the right differential shell in a penetrating manner, and threaded holes are formed in the cross shaft corresponding to the round holes;

and the connecting piece is respectively penetrated through the connecting hole, the round hole and the threaded hole.

Preferably, the number of the side gears is two, and the two side gears are symmetrically arranged on two sides of the cross shaft respectively.

Preferably, the differential mechanism further comprises a gasket, the gasket is arranged in the cavity, and two sides of the gasket are respectively abutted against the inner wall of the left differential case and the side gear.

Preferably, a limiting end face is arranged on the inner wall of the left differential case, and the gasket abuts against the limiting end face.

Preferably, an axial hole is provided in the differential left case along the axial direction thereof, and the axial diameter of the side gear is inserted through the axial hole.

Preferably, the bevel gear further comprises a driving bevel gear, wherein a bevel gear shape is arranged on the driven bevel gear, and the bevel gear shape is meshed with the driving bevel gear.

Preferably, a first fixing groove is formed in the left differential case, a second fixing groove is formed in the right differential case, and the first fixing groove and the second fixing groove are closed to form a through hole for the cross shaft to penetrate through.

Preferably, the differential mechanism further comprises a shell, a first bearing and a second bearing, wherein the first bearing is sleeved on the left differential mechanism shell and is located between the left differential mechanism shell and the shell, and the second bearing is sleeved on the right differential mechanism shell and is located between the right differential mechanism shell and the shell.

Preferably, a first shoulder for limiting the first bearing is arranged on the outer wall of the left differential case, and a second shoulder for limiting the second bearing is arranged on the outer wall of the right differential case.

In order to achieve the purpose, the utility model also provides a drive axle comprising the differential assembly.

The utility model has the beneficial effects that:

this embodiment provides a differential mechanism assembly, through setting up differential mechanism left side casing and differential mechanism right side casing for the differential mechanism casing is split type structure, the installation and the dismantlement of planetary gear, cross axle of being convenient for. Differential left side casing part sets up in driven bevel gear for differential left side casing can partly inlay in driven bevel gear, leads to differential assembly's structure compacter, and space utilization is high. Because the process of processing the threaded hole on the driven bevel gear is relatively complicated, compared with the prior art, the embodiment is provided with the round hole on the driven bevel gear along the axial direction thereof, and the threaded hole does not need to be processed on the driven bevel gear, thereby reducing the processing cost. Be provided with the circular arc groove and the annular of intercommunication each other in driven bevel gear, through set up circular arc groove and annular in driven bevel gear, alleviateed driven bevel gear's weight, satisfy lightweight demand.

The annular bosses are arranged in the annular grooves and used for axial limiting of the left differential shell. By adopting the structure, the axial limiting can be ensured while the circumferential limiting of the driven bevel gear and the left shell of the differential mechanism is ensured, the position stability is good, and the reliability is high.

The embodiment also provides a drive axle, including foretell differential mechanism assembly, compact structure, whole light in weight satisfies the demand of lightweight.

Drawings

FIG. 1 is a schematic structural view of a differential assembly of the present invention;

FIG. 2 is a schematic view of the mating arrangement of the left differential housing and the driven bevel gear of the differential assembly of the present invention;

FIG. 3 is a schematic representation of the construction of the driven bevel gear in the differential assembly of the present invention;

FIG. 4 is a schematic view of a differential assembly of the present invention showing a circular groove configuration.

In the figure:

1. a driven bevel gear; 2. a differential left housing; 3. a differential right housing; 4. a planetary gear; 5. a half shaft gear; 6. a cross shaft; 7. a connecting member; 8. a gasket; 9. a first bearing; 10. a second bearing;

11. an arc groove; 12. a ring groove; 13. a bevel gear shape;

21. an annular boss; 22. a limiting end face; 23. an axial bore.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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 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.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

The embodiment provides a differential mechanism assembly, is applicable to car axle technical field. As shown in fig. 1, the differential assembly includes a differential case including a left differential case 2 and a right differential case 3, a planetary gear 4, a cross shaft 6, and a side gear 5, and the right differential case 3 is connected to the left differential case 2 to form a cavity between the left differential case 2 and the right differential case 3.

The planetary gears 4 are arranged in the cavity of the differential case, and the differential case plays a role in containing and integrally supporting. A half shaft gear 5 is arranged in the planetary gear 4, the half shaft gear 5 is sleeved on a cross shaft 6, the cross shaft 6 penetrates through the planetary gear 4 and the differential shell respectively to ensure the fixing effect of the cross shaft 6, and the planetary gear 4 and the half shaft gear 5 are meshed with each other to ensure the power transmission effect.

Through setting up differential left side casing 2 and differential right side casing 3 for the differential casing is split type structure, the installation and the dismantlement of planetary gear 4, cross 6 of being convenient for. Preferably, after the side gears 5, the cross shafts 6, and the planetary gears 4 are assembled into the differential gear set, the differential gear set and the differential case of an integral structure are assembled.

As shown in fig. 1, the differential assembly provided by the present embodiment further includes a driven bevel gear 1 and a connecting member 7, and the left differential case 2 is partially disposed in the driven bevel gear 1, so that the left differential case 2 can be partially embedded in the driven bevel gear 1, which results in a more compact structure and high space utilization of the differential assembly.

A round hole is formed in the driven bevel gear 1 along the axial direction of the driven bevel gear, a threaded hole is formed in the cross shaft 6 corresponding to the round hole, a connecting hole is formed in the differential left shell 2 corresponding to the round hole, and the connecting piece 7 penetrates through the connecting hole, the round hole and the threaded hole respectively. The connecting piece 7 is preferably a bolt, adopts a threaded connection mode, and is simple to operate and convenient to mount and dismount.

Because the process of processing the threaded hole on the driven bevel gear 1 is relatively complicated, compared with the prior art, the embodiment is provided with the round hole on the driven bevel gear 1 along the axial direction thereof, and the threaded hole does not need to be processed on the driven bevel gear 1, thereby reducing the processing cost.

As shown in fig. 2, 3 and 4, the driven bevel gear 1 is provided with the circular arc groove 11 and the ring groove 12 which are communicated with each other, and the circular arc groove 11 and the ring groove 12 are formed in the driven bevel gear 1, so that the weight of the driven bevel gear 1 is reduced, and the requirement for light weight is satisfied.

A plurality of arc grooves 11 evenly set up along driven bevel gear 1's circumference, are provided with a plurality of arc pieces on differential left side casing 2 is close to the outer wall of driven bevel gear 1 one side, and a plurality of arc piece one-to-one set up in a plurality of arc grooves 11 for differential left side casing 2's circumference is spacing, is provided with annular boss 21 on differential left side casing 2's terminal surface outer wall, and annular boss 21 sets up in annular groove 12, is used for differential left side casing 2's axial spacing. By adopting the structure, the driven bevel gear 1 and the differential left shell 2 are circumferentially limited, and simultaneously, the axial limitation can be ensured, the position stability is good, and the reliability is high.

Wherein, the quantity of side gear 5 is two, and two side gear 5 symmetry respectively set up in the both sides of cross 6, and every side gear 5 corresponds to the toper tooth of a planetary gear 4, further guarantees the transmission effect.

As shown in fig. 1, the sub-shafts of the cross 6 are respectively inserted through the planetary gear 4 and the differential case to ensure the installation and fixing effects of the cross 6. Preferably, a through hole is formed in the planetary gear 4, the inner diameter of the through hole is matched with the outer diameter of the sub-shaft, the through hole plays a role in avoiding the cross shaft 6, and the sub-shaft achieves a supporting role on the planetary gear 4. Meanwhile, a first fixing groove is formed in the left differential case 2, a second fixing groove is formed in the right differential case 3, and the first fixing groove and the second fixing groove are folded to form a through hole for the cross shaft 6 to penetrate through so as to guarantee the installation stability of the cross shaft 6 and the differential case.

In order to avoid the abrasion caused by the mutual contact between the planetary gear 4 and the differential case, as shown in fig. 1, the differential assembly further comprises a gasket 8, the gasket 8 is arranged in the cavity, and two sides of the gasket 8 are respectively abutted against the inner wall of the differential left case 2 and the side gear 5. The gasket 8 is positioned between the inner wall of the left differential case 2 and the side gear 5, so that the gasket 8 plays a role in isolation between the left differential case 2 and the side gear 5, the damage caused by the mutual friction between the side gear 5 and the inner wall of the differential case in the rotating process is avoided, and the protective effect is achieved.

Preferably, as shown in fig. 2, a limit end surface 22 is provided on the inner wall of the differential left case 2, and the spacer 8 abuts against the limit end surface 22. One side of the gasket 8 is attached to the tooth-shaped inner side end face of the half shaft gear 5, and the other side of the gasket is attached to the inner wall of the differential case, so that two side faces of the gasket 8 can be matched with the half shaft gear 5 and the differential case, the shape following effect is achieved, and the space utilization rate is further guaranteed.

Preferably, an axial hole 23 is provided in the differential left case 2 in the axial direction thereof, the axial diameter of the side gear 5 is bored through the axial hole 23, and the axial hole 23 provides an axial installation space for the axial diameter of the side gear 5.

Furthermore, the differential assembly also comprises a driving bevel gear, wherein a bevel gear profile 13 is arranged on the driven bevel gear 1, the bevel gear profile 13 is meshed with the driving bevel gear, and the driving bevel gear can drive the driven bevel gear 1 to rotate.

Further, as shown in fig. 1, the differential assembly further includes an outer casing, a first bearing 9 and a second bearing 10, wherein the first bearing 9 is sleeved on the left differential casing 2 and is located between the left differential casing 2 and the outer casing, so as to ensure the smoothness of the rotation of the left differential casing 2. The second bearing 10 is sleeved on the right differential case 3 and located between the right differential case 3 and the outer casing to ensure the smoothness of the rotation of the right differential case 3.

Further, a first shoulder for limiting the position of the first bearing 9 is arranged on the outer wall of the left differential case 2 to ensure the positioning of the first bearing 9 in the axial direction. A second shoulder for limiting the second bearing 10 is arranged on the outer wall of the right differential case 3 to ensure the positioning of the second bearing 10 in the axial direction.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are based on the orientations and positional relationships shown in the drawings and are used for convenience in description and simplicity in operation, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A differential assembly, comprising:

the bevel gear mechanism comprises a driven bevel gear (1), wherein arc grooves (11) and annular grooves (12) which are communicated with each other are formed in the driven bevel gear (1), the arc grooves (11) are uniformly formed in the circumferential direction of the driven bevel gear (1), and a circular hole is formed in the driven bevel gear (1) in the axial direction of the driven bevel gear;

the differential left shell (2) is partially arranged in the driven bevel gear (1), a plurality of arc-shaped blocks are arranged on the outer wall of one side, close to the driven bevel gear (1), of the differential left shell (2), the arc-shaped blocks are arranged in the arc grooves (11) in a one-to-one correspondence mode and used for circumferential limiting of the differential left shell (2), an annular boss (21) is arranged on the outer wall of the end face of the differential left shell (2), the annular boss (21) is arranged in the annular groove (12) and used for axial limiting of the differential left shell (2), and a connecting hole is formed in the differential left shell (2) corresponding to the round hole;

the differential right shell (3) is connected to the differential left shell (2), and a cavity is formed between the differential left shell (2) and the differential right shell (3);

a planetary gear (4) and a side gear (5) which are arranged in the cavity, wherein the planetary gear (4) and the side gear (5) are meshed with each other;

the cross shaft (6) is respectively arranged in the planetary gear (4) and the right differential housing (3) in a penetrating mode, and threaded holes are formed in the cross shaft (6) corresponding to the round holes;

and the connecting piece (7) is respectively penetrated through the connecting hole, the round hole and the threaded hole.

2. A differential assembly according to claim 1, wherein the number of the side gears (5) is two, and the two side gears (5) are respectively provided symmetrically on both sides of the cross shaft (6).

3. The differential assembly according to claim 1, further comprising a spacer (8), wherein the spacer (8) is disposed in the cavity, and both sides of the spacer (8) abut against the inner wall of the differential left case (2) and the side gear (5), respectively.

4. A differential assembly according to claim 3, characterized in that a limiting end surface (22) is provided on the inner wall of the differential left casing (2), and the spacer (8) abuts against the limiting end surface (22).

5. A differential assembly according to claim 1, wherein an axial hole (23) is provided in the differential left case (2) in the axial direction thereof, and the shaft diameter of the side gear (5) is bored through the axial hole (23).

6. A differential assembly according to claim 1, further comprising a drive bevel gear, wherein a bevel gear profile (13) is provided on the driven bevel gear (1), and the bevel gear profile (13) is engaged with the drive bevel gear.

7. A differential assembly according to claim 1, characterized in that a first fixing groove is provided on the left differential case (2) and a second fixing groove is provided on the right differential case (3), said first and second fixing grooves being closed to form a through hole for the cross-shaft (6) to pass through.

8. The differential assembly according to claim 1, further comprising an outer case, a first bearing (9) and a second bearing (10), wherein the first bearing (9) is sleeved on the left differential case (2) and located between the left differential case (2) and the outer case, and the second bearing (10) is sleeved on the right differential case (3) and located between the right differential case (3) and the outer case.

9. A differential assembly according to claim 8, characterised in that a first shoulder for the first bearing (9) is provided on the outer wall of the left differential case (2) and a second shoulder for the second bearing (10) is provided on the outer wall of the right differential case (3).

10. A drive axle comprising a differential assembly as claimed in any one of claims 1 to 9.