CN219975271U - Low-friction high-durability differential mechanism assembly structure - Google Patents
Low-friction high-durability differential mechanism assembly structure Download PDFInfo
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- CN219975271U CN219975271U CN202320895060.9U CN202320895060U CN219975271U CN 219975271 U CN219975271 U CN 219975271U CN 202320895060 U CN202320895060 U CN 202320895060U CN 219975271 U CN219975271 U CN 219975271U
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- tooth surface
- cross shaft
- shell
- shaft
- differential
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- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000005096 rolling process Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000002679 ablation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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Abstract
The utility model discloses a low-friction high-durability differential mechanism assembly structure which comprises tooth surface difference shells, tooth back difference shells, a cross shaft, tapered roller bearings, half shaft gears and planetary gears, wherein the tooth surface difference shells are connected with the tooth back difference shells, the tooth surface difference shells are connected with driven bevel gears, the driven bevel gears are in meshed transmission with driving bevel gears, the inner sides of the tooth surface difference shells are connected with the cross shaft, the planetary gears are connected with the cross shaft through the tapered roller bearings, the number of the half shaft gears is two, the two half shaft gears are respectively arranged on two sides of the cross shaft, the half shaft gears are in meshed transmission with the planetary gears, and the two half shaft gears are respectively connected with an output shaft. According to the utility model, by arranging the tapered roller bearing, sliding friction between the planetary gear and the cross shaft is changed into rolling friction, so that friction force between the planetary gear and the cross shaft is greatly reduced, and service lives of the planetary gear and the cross shaft are prolonged.
Description
Technical Field
The utility model belongs to the field of automobile parts, and particularly relates to a low-friction high-durability differential mechanism assembly structure.
Background
The common failure mode of the differential assembly in the current automobile field is represented by abrasion and ablation failure of internal parts of the differential, and particularly, the common failure mode is particularly apparent in automobiles with high occurrence frequency of heavy-load differential. In the traditional differential mechanism design structure, the common planetary gears and the differential shell, the planetary gears and the cross shafts are all sliding friction pairs, and furthermore, the planetary gears and the planetary gear gaskets, and the planetary gear gaskets and the differential shell are all sliding friction pairs.
The traditional inferior shell design is generally two half shells, and a combined piece is required to process a spherical surface and a cross shaft hole, so that the processing precision is poor and the processing difficulty is high. Some designs, while employing an integral differential housing, employ split cross-shaft designs based on assembly requirements that are not sufficiently rigid, result in increased planetary and side gear drive errors.
In summary, the multiple sliding friction pairs, the high processing difficulty, the low precision, the large transmission error and other problems of the existing differential assembly all cause the abrasion of the parts of the differential assembly to be increased.
Disclosure of Invention
The utility model provides a low-friction high-durability differential assembly structure, aiming at solving a series of problems of multiple sliding friction pairs, high processing difficulty, low precision, large transmission error and the like of the existing differential assembly and solving the problems of premature wear and ablation failure of differential parts caused by serious internal friction loss of a differential.
In order to solve the problems in the prior art, the utility model adopts the following technical scheme:
a low-friction high-durability differential assembly structure comprises a tooth surface differential shell, a tooth back differential shell, a cross shaft, a tapered roller bearing, a half shaft gear and a planetary gear.
The tooth surface difference shell is connected with the tooth back difference shell, the tooth surface difference shell is connected with a driven bevel gear, and the driven bevel gear is meshed with the driving bevel gear for transmission.
The inner side of the tooth surface differential shell is connected with a cross shaft, and the planetary gear is connected with the cross shaft through a tapered roller bearing.
The two half-shaft gears are respectively arranged on two sides of the cross shaft, the half-shaft gears are meshed with the planetary gears for transmission, and the two half-shaft gears are respectively connected with an output shaft.
By arranging the tapered roller bearing, sliding friction between the planetary gear and the cross shaft is changed into rolling friction, so that friction between the planetary gear and the cross shaft is greatly reduced, and the service lives of the planetary gear and the cross shaft are prolonged.
Furthermore, the planetary gear and the outer ring of the tapered roller bearing adopt an integrated design and an integrated structure.
Further, the cross shaft comprises a split long cross shaft and a split short cross shaft, the tooth surface difference shell is provided with a plurality of cross shaft holes, the split long cross shaft and the split short cross shaft penetrate through the cross shaft holes to be in butt joint with the driven bevel gear, and the tooth surface difference shell, the tooth surface difference shell and the driven bevel gear are connected through connecting bolts.
Further, the half-shaft gear comprises a left half-shaft gear and a right half-shaft gear, a thrust washer is arranged between the tooth back difference shell and the left half-shaft gear, and a thrust washer is arranged between the tooth surface difference shell and the right half-shaft gear.
Further, one end of the tooth surface difference shell, which is far away from the tooth surface difference shell, is connected with a tooth surface bearing, the tooth surface difference shell adopts an integrated design and an integrated structure, the inner side of the tooth surface difference shell is a rotating surface, the rotating surface is of an aspheric surface design, and the inner ring of the tapered roller bearing is clung to the rotating surface.
Furthermore, the internal rotating surface of the tooth surface difference shell and the cross shaft hole are arranged on the tooth surface difference shell, the tooth back difference shell and the tooth surface difference shell combined piece are not required to be processed into a spherical surface and the cross shaft hole, and the split long cross shaft and the split short cross shaft are axially limited by virtue of the driven bevel gear.
The beneficial effects of the utility model are as follows: the utility model solves the problems of premature wear and ablation failure of the parts of the differential caused by serious friction loss in the automobile differential, is particularly suitable for vehicles with long mileage and multiple working stations and heavy load differential, can inhibit the wear failure of the differential caused by the wear failure from the source of the friction loss, and can improve the differential durability of the differential caused by the wear failure.
1. According to the utility model, the tapered roller bearing is arranged between the planetary gear and the split-type one-long two-short cross shaft, and the rolling friction pair is used for replacing the sliding friction pair, so that pure rolling rotation is realized, and the friction loss of the kinematic pair in the differential mechanism is effectively reduced.
2. The tooth surface differential shell adopts an integrated design, the part is molded and processed at one time, two split differential shells are not required to be processed by a combined part, a spherical surface is not required to be processed, the processing precision is high, the processing manufacturability is better, and the friction loss caused by processing and manufacturing errors can be effectively reduced.
3. The split type one-long two-short cross shaft support has good rigidity, can meet the requirement of integral differential shell assembly, has high meshing precision of the bevel gear of the differential mechanism, namely small transmission error, and can effectively reduce friction loss generated by the transmission error.
4. The internal rotating surface of the tooth surface differential shell is of an aspheric design, and the tapered roller bearing inner ring is tightly attached to the rotating surface of the tooth surface differential shell to prevent the tapered roller bearing inner ring from rotating in the running process of the differential mechanism.
5. The split long cross shaft and the split short cross shaft are limited by virtue of the driven bevel gear in the axial direction, so that the split long cross shaft and the split short cross shaft can be effectively prevented from being separated, and the differential assembly is unstable in transmission.
Drawings
FIG. 1 is a schematic cross-sectional view of the present utility model.
Fig. 2 is a schematic cross-sectional view of fig. 1 along A-A.
In the figure: 1-a tooth back bearing; 2-tooth back difference shell; 3-connecting bolts; 4-driven bevel gears; 5-tooth surface difference shell; 6-tooth surface bearings; 7-thrust washers; 8-right side gear; 9-split long cross shaft; 10-cross shaft holes; 11-split short cross shaft; 12-a rotation surface; 13-tapered roller bearings; 14-planetary gears; 15-left side gear.
Detailed Description
The utility model is further described with reference to the drawings and reference numerals.
In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.
The terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.
Example 1:
as shown in fig. 1, a low friction high durability differential assembly structure includes a tooth face differential case 5, a tooth back differential case 2, a cross shaft, tapered roller bearings 13, a side gear, and a planetary gear 14.
The tooth surface difference shell 5 is connected with the tooth back difference shell 2, the tooth surface difference shell 5 is connected with the driven bevel gear 4, and the driven bevel gear 4 is meshed with a driving bevel gear (not shown in the figure) for transmission.
The inner side of the tooth surface differential shell 5 is connected with a cross shaft, and the planetary gear 14 is connected with the cross shaft through a tapered roller bearing 13.
The two half-shaft gears are respectively arranged at two sides of the cross shaft, the half-shaft gears are meshed with the planetary gears 14 for transmission, and the two half-shaft gears are respectively connected with an output shaft.
By arranging the tapered roller bearing 13, sliding friction between the planetary gear 14 and the cross shaft is changed into rolling friction, so that friction force between the planetary gear 14 and the cross shaft is greatly reduced, and service lives of the planetary gear 14 and the cross shaft are prolonged.
Example 2:
on the basis of embodiment 1, the planetary gear 14 and the outer ring of the tapered roller bearing 13 are of an integrated design and an integrated structure.
The cross shaft comprises a split long cross shaft 9 and a split short cross shaft 11, the tooth surface difference shell 5 is provided with a cross shaft hole 10, and the split long cross shaft 9 and the split short cross shaft 11 pass through the cross shaft hole 10 to be abutted with the driven bevel gear 4.
The tooth back difference shell 2, the tooth surface difference shell 5 and the driven bevel gear 4 are connected through a connecting bolt 3.
The side gears comprise a left side gear 15 and a right side gear 8, a thrust washer 7 is arranged between the tooth back difference shell 2 and the left side gear 15, and a thrust washer 7 is arranged between the tooth surface difference shell 5 and the right side gear 8.
One end of the tooth surface difference shell 2 far away from the tooth surface difference shell 5 is connected with a tooth surface bearing 1, and one end of the tooth surface difference shell 5 far away from the tooth surface difference shell 2 is connected with a tooth surface bearing 6.
The tooth surface differential shell 5 adopts an integrated design and an integrated structure, the inner side of the tooth surface differential shell 5 is a rotary surface 12, the rotary surface 12 is of an aspheric design (the aspheric design can be elliptical or circular), and the inner ring of the tapered roller bearing 13 is tightly attached to the rotary surface 12.
The inner rotary surface 12 of the tooth surface difference shell 5 and the cross shaft hole 10 are arranged on the tooth surface difference shell 5, and the tooth surface difference shell 2 and the tooth surface difference shell 5 do not need to be combined to process a spherical surface and the cross shaft hole 10.
The split long cross shaft 9 and the split short cross shaft 11 are limited by the driven bevel gear 4 in the axial direction.
The specific working principle is as follows:
the driving bevel gear drives the driven bevel gear 4 to rotate, the driven bevel gear 4 drives the cross shaft and the planetary gears 14 to rotate through the tooth surface difference shell 5, if the vehicle runs straight, the two side gears synchronously rotate under the drive of the planetary gears 14, and if the vehicle runs in a turning mode, the two side gears do not synchronously rotate along the planetary gears 14, so that the asynchronous rotation of the two wheels is realized.
The utility model is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present utility model, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present utility model, fall within the scope of protection of the present utility model.
Claims (8)
1. A low friction high durability differential assembly structure, characterized by: comprises a tooth surface differential shell (5), a tooth back differential shell (2), a cross shaft, a tapered roller bearing (13), a half shaft gear and a planetary gear (14);
the tooth surface difference shell (5) is connected with the tooth back difference shell (2), the tooth surface difference shell (5) is connected with the driven bevel gear (4), and the driven bevel gear (4) is meshed with the driving bevel gear for transmission;
the inner side of the tooth surface differential shell (5) is connected with a cross shaft, and the planetary gear (14) is connected with the cross shaft through a tapered roller bearing (13);
the two half-shaft gears are respectively arranged at two sides of the cross shaft, the half-shaft gears are meshed with the planetary gears (14) for transmission, and the two half-shaft gears are respectively connected with an output shaft.
2. The low friction, high durability differential assembly structure according to claim 1, wherein: the planetary gear (14) and the outer ring of the tapered roller bearing (13) are of an integrated structure.
3. The low friction, high durability differential assembly structure according to claim 1, wherein: the cross shaft comprises a split long cross shaft (9) and a split short cross shaft (11), the tooth surface difference shell (5) is provided with a plurality of cross shaft holes (10), and the split long cross shaft (9) and the split short cross shaft (11) penetrate through the cross shaft holes (10) to be abutted to the driven bevel gear (4).
4. The low friction, high durability differential assembly structure according to claim 2, wherein: the tooth back difference shell (2), the tooth surface difference shell (5) and the driven bevel gear (4) are connected through a connecting bolt (3).
5. The low friction, high durability differential assembly structure according to claim 4, wherein: the side gear comprises a left side gear (15) and a right side gear (8), a thrust washer (7) is arranged between the tooth back difference shell (2) and the left side gear (15), and a thrust washer (7) is arranged between the tooth surface difference shell (5) and the right side gear (8).
6. The low friction, high durability differential assembly structure according to claim 1, wherein: one end of the tooth surface difference shell (2) far away from the tooth surface difference shell (5) is connected with a tooth surface bearing (1), and one end of the tooth surface difference shell (5) far away from the tooth surface difference shell (2) is connected with a tooth surface bearing (6).
7. The low friction, high durability differential assembly structure according to claim 3, wherein: the tooth surface differential shell (5) is of an integrated structure, the inner side of the tooth surface differential shell (5) is a rotary surface (12), and the inner ring of the tapered roller bearing (13) is tightly attached to the rotary surface (12).
8. The low friction, high durability differential assembly structure according to claim 7, wherein: the rotary surface (12) and the cross shaft hole (10) are both arranged on the tooth surface differential shell (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320895060.9U CN219975271U (en) | 2023-04-20 | 2023-04-20 | Low-friction high-durability differential mechanism assembly structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320895060.9U CN219975271U (en) | 2023-04-20 | 2023-04-20 | Low-friction high-durability differential mechanism assembly structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219975271U true CN219975271U (en) | 2023-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320895060.9U Active CN219975271U (en) | 2023-04-20 | 2023-04-20 | Low-friction high-durability differential mechanism assembly structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219975271U (en) |
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2023
- 2023-04-20 CN CN202320895060.9U patent/CN219975271U/en active Active
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