CN210978432U - Automobile differential mechanism - Google Patents
Automobile differential mechanism Download PDFInfo
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- CN210978432U CN210978432U CN201921254127.0U CN201921254127U CN210978432U CN 210978432 U CN210978432 U CN 210978432U CN 201921254127 U CN201921254127 U CN 201921254127U CN 210978432 U CN210978432 U CN 210978432U
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- composite bushing
- side gear
- wall
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Abstract
The utility model relates to an automobile parts discloses an automobile differential mechanism, including differential mechanism shell and side gear, wherein the differential mechanism shell includes: the shell is provided with a base part and an insertion part, a step surface is formed at one end of the base part close to the insertion part, and a limiting structure is formed on the inner wall of the insertion part; the steel back composite bushing is abutted against the limiting structure along the radial direction and the axial direction, and a lubricating oil layer can be formed on the inner wall of the steel back composite bushing; and the gasket is arranged on the step surface. The utility model discloses a steel backing composite bushing follows two-way configuration in limit structure to obtain better stability can, steel backing composite bushing's inner wall forms the lubricated oil reservoir simultaneously, makes and keeps better lubricity between the inner wall of this automobile differential shell and the differential side gear, prevents that the differential side gear from causing the harm to automobile differential shell when the motion, thereby has prolonged the whole case life-span of gearbox.
Description
Technical Field
The utility model relates to an automobile parts, concretely relates to automobile differential mechanism.
Background
At present, most of automobile power assemblies adopt a transverse front drive and transverse four-drive arrangement mode, which requires that a transmission simultaneously has the functions of speed and torque between distribution wheels of a drive axle, a differential serves as a core element for realizing vehicle differential, on one hand, the differential receives the torque transmitted by a transmission shafting through a differential case, on the other hand, a left drive shaft and a right drive shaft of the vehicle are connected through a half axle gear to realize torque and rotating speed distribution, under the differential working condition, an inner hole of the differential case is in mutual contact with the diameter of the half axle gear shaft, and the differential case and the half axle gear are in relative sliding while transmitting large torque, however, the differential case usually adopts cast iron materials and the half axle gear adopts quenching steel, the hardness of the differential case and the half axle gear has larger difference, so that the inner hole of the differential.
SUMMERY OF THE UTILITY MODEL
The utility model provides an automobile differential mechanism for the serious problem of inner wall wearing and tearing of the differential mechanism shell that arouses when solving differential mechanism shell and semi-axis gear shaft relative motion among the prior art.
The utility model provides an automobile differential mechanism, including differential mechanism shell and side gear, side gear rotationally inserts and establishes in the differential mechanism shell, wherein:
the differential case includes:
the shell is provided with a base part and an insertion part, one end of the base part, which is connected with the insertion part, forms a step surface, and the inner wall of the insertion part is provided with a limiting structure;
the steel back composite bushing is arranged in the limiting structure along the radial direction and the axial direction;
the gasket is arranged on the step surface;
one end of the half axle gear abuts against the step surface through the gasket, and a lubricating oil layer can be formed by the other end of the half axle gear and the inner wall of the steel backing composite bushing.
The beneficial effects are that: the steel back composite bushing is arranged in the limiting structure in the two directions, so that good stability is obtained, meanwhile, a lubricating oil layer is formed on the inner wall of the steel back composite bushing, so that good lubricity is kept between the inner wall of the automobile differential case and the half axle gear, the automobile differential case is prevented from being damaged when the half axle gear moves, and the service life of the whole gearbox is prolonged; the side gears may be positioned in contact with the housing by a spacer.
As a preferable mode of the automobile differential, the insertion portion has an insertion end and a protruding end close to the base, an inner edge of the insertion end is radially recessed by a first distance to form an annular groove, a bottom of the annular groove extends to the base in the axial direction by a second distance to finally form the limiting structure, and the length of the second distance is smaller than that of the insertion portion.
As a preferable scheme of the automobile differential, the steel-backed composite bushing is C-shaped and has an opening, and the steel-backed composite bushing is in interference fit with the limiting structure.
As a preferable scheme of the automobile differential, when the steel-backed composite bushing is in interference fit in the limiting structure, the opening is closed. The steel back composite bushing is in interference fit in the shell, and the continuous structure formed by closing the opening after the steel back composite bushing is inserted into the shell can reduce the abrasion to the steel back composite bushing when the half axle gear moves. Further reduce the wearing and tearing to steel backing composite bushing when the side gear moves, make the thickness homogeneity of the lubricating oil film between steel backing composite bushing and the side gear better simultaneously. After the steel back composite bushing is configured on the limiting structure, the inner surface of the steel back composite bushing and the part of the insertion part of the shell excluding the limiting mechanism form a uniform inner diameter, so that the half axle gear can conveniently move along the axial direction and rotate in the circumferential direction in the shell, and friction is reduced.
As a preferable mode of the above automotive differential, the wall thickness of the steel-backed composite bush is equal to the first distance, and the length of the steel-backed composite bush is equal to the second distance.
As a preferable scheme of the above automobile differential, the steel backing composite bushing includes a steel backing and an antifriction coating, an outer peripheral surface of the steel backing can abut against an inner wall of the limiting structure, and the antifriction coating is formed on the inner peripheral surface of the steel backing.
As a preferable mode of the automobile differential, the circumferential surface of the antifriction coating layer facing away from the steel backing is formed with a plurality of lubricating oil grooves, and the lubricating oil grooves can store lubricating oil. Set up better accomodating of lubrication oil groove, storage lubricating oil.
As a preferable mode of the above-mentioned automobile differential, the oil groove is a circular groove. Compared with lubricating oil grooves with other shapes, the circular shape is more convenient for grooving.
As a preferable mode of the above automotive differential, the opening is parallel to an axial direction of the steel-backed composite bush. At the moment, the opening is parallel to the axial direction of the steel-backed composite bushing, so that the opening is conveniently machined on the steel-backed composite bushing.
As a preferable mode of the above-mentioned automobile differential, the spacer is provided with a plurality of lubrication holes at equal angular intervals in the circumferential direction, the lubrication holes extending in the axial direction of the spacer.
Drawings
Fig. 1 is a schematic structural diagram of an automobile differential provided by an embodiment of the present invention;
FIG. 2 is a schematic perspective view of the differential carrier housing of the vehicle shown in FIG. 1;
FIG. 3 is an exploded view of the automotive differential carrier housing shown in FIG. 1;
FIG. 4 is a schematic view of the structure of the insertion portion of the housing of FIG. 3;
FIG. 5 is a schematic structural view of a steel backed composite bushing;
FIG. 6 is an enlarged view of a portion of the steel backed composite bushing shown in FIG. 5;
fig. 7 is a perspective view of the side gear of fig. 3.
In the figure:
100. an automotive differential case; 200. a half shaft gear; 1. a housing; 2. a steel backed composite bushing; 3. a gasket; 11. a base; 12. an insertion portion; 12A, an insertion end and a 12B extension end; 13. a connecting portion; 20. an opening; 21. a steel backing; 22. an antifriction coating; 31. a lubricating oil hole; 111. a step surface; 121. a limiting structure; 201. a long shaft portion; 202 a tooth part; 221. a lubricating oil groove; 2021. abutting against the end face.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1 to 3, the present invention provides a differential mechanism for an automobile, which includes an automobile differential case 100 and a side gear 200, wherein the side gear 200 is rotatably inserted into the automobile differential case 100.
The differential case 100 for the automobile comprises a case 1, a steel back composite bushing 2 and a gasket 3, wherein the side gear 200 is rotatably arranged in the case 1, the steel back composite bushing 2 is arranged on the inner wall of the first end of the case 1 and can form a lubricating oil film with the side gear 200, the gasket 3 is arranged on the inner wall of the second end of the case 1, and the side gear 200 is positioned in contact with the case 1 through the gasket 3.
The housing 1 includes a base portion 11 and an insertion portion 12 (the base portion 11 and the insertion portion 12 are arranged along an axis L, and an axis L is a central axis of the differential case 100) that are coaxially arranged, the inner diameter of the base portion 11 is larger than the inner diameter of the insertion portion 12, a step surface 111 is formed at one end of the base portion 11 near the insertion portion 12, and the gasket 3 is provided on the step surface 111.
The interior of the base 11 is used to house other components of the automotive differential, such as the differential side cone, the frame, the planetary gears, etc.
The base 11 forms an annular step surface 111, and the gasket 3 is also annular. In the present embodiment, the radial length of the gasket 3 is the same as the radial length of the step surface 111, so that the gasket 3 is just attached to the step surface 111.
As shown in fig. 3, in the present embodiment, the gasket 3 is provided with a plurality of lubrication oil holes 31 at equal angular intervals in the circumferential direction.
It should be noted that the outer edge of one end of the base portion 11 away from the insertion portion 12 extends outward to form a connecting portion 13, and a plurality of mounting holes are provided on the connecting portion 13 at equal angular intervals in the circumferential direction, so that the two differential cases 1 can be relatively fitted and connected along the axis L through the mounting holes.
The inner wall of the insertion part 12 forms a limiting structure 121 for radially matching the steel-backed composite bushing 2, and the steel-backed composite bushing 2 is positioned in both axial and radial directions when being positioned in the limiting structure 121.
With reference to fig. 1 and 4, the position limiting structure 121 is formed by: the insertion portion 12 has an insertion end 12A and a protruding end 12B near the base, the inner edge of the insertion end 12A is radially recessed (e.g., by lathing) by a first distance d1 to form an annular groove, and then extends axially from the bottom of the annular groove toward the base 11 by a second distance d2, and the length of the second distance d2 is smaller than the length of the insertion portion 12, thereby forming the stopper structure 121.
As shown in fig. 5, the steel-backed composite bushing 2 is C-shaped and has an opening 20, and has a certain elasticity, and when the steel-backed composite bushing 2 is interference-fitted in the limiting structure 121, the opening 20 is closed. The steel-backed composite bushing 20 forms a closed continuous structure to reduce wear on the steel-backed composite bushing 2 during movement of the side gear 200.
During matching, the steel back composite bushing 2 abuts against the tail end of the limiting structure 121, the radial distance of the steel back composite bushing 2 before compression is larger than the inner diameter of the limiting structure 121, after the steel back composite bushing 2 is compressed, the steel back composite bushing 2 can extend into the limiting structure 121, because the inner wall of the limiting structure 121 forms a radially inward compression force on the steel back composite bushing 2, the steel back composite bushing 2 has a tendency of outward expansion, and is in interference fit in the limiting structure 121, and the opening 20 is closed at the moment, so that the steel back composite bushing 2 can form a continuous structure, and lubricating oil can be prevented from falling into a gap formed by the opening 20 before.
Preferably, the opening 20 of the steel-backed composite bushing 2 forms a circular inner wall when closed, thereby providing better uniformity in the thickness of the lubricating oil film between the steel-backed composite bushing 2 and the side gear 200.
In this embodiment, the openings 20 separate the steel-backed composite liner 2 in a direction parallel to the axis L, i.e., the openings 20 are parallel to the axial direction of the steel-backed composite liner 2, thereby facilitating machining of the openings 20 in the steel-backed composite liner 2.
In the embodiment, the wall thickness of the steel-backed composite bushing 2 is equal to the first distance d1, the length of the steel-backed composite bushing 2 is equal to the second distance d2, and after the steel-backed composite bushing 2 is arranged on the limiting structure 121, the inner surface of the steel-backed composite bushing 2 and the part of the insertion portion 12 of the case 1 excluding the limiting mechanism 121 form a uniform inner diameter, so that the side gear 200 can be conveniently moved in the axial direction and rotated in the circumferential direction in the case 1, and friction is reduced.
As shown in fig. 6, the steel back composite bushing 2 includes a steel back 21 and an antifriction coating 22, the outer circumferential surface of the steel back 21 can abut against the inner wall of the position limiting structure 121, and the antifriction coating 22 is formed on the inner circumferential surface of the steel back 21.
The antifriction coating 22 is formed with a plurality of lubricating oil grooves 221 away from the steel backing 21, and the lubricating oil grooves 221 can store lubricating oil for lubrication. When the side gear 200 is opposite to the steel-backed composite bush 2, a lubricating oil layer is formed between the lubricating oil contained in the lubricating oil groove 221 and the side gear 200, so that a lubricating effect is provided for the side gear 200, and further, the abrasion is reduced.
In the present embodiment, the lubricating oil groove 221 is a circular groove. Thereby facilitating grooving. The shape of the oil groove 221 is not limited to a circular shape, and may be, for example, an oval shape, a square shape, a triangular shape, or the like.
As shown in fig. 7, the side gear 200 includes a long shaft portion 201 and a tooth portion 202, the tooth portion 202 is formed at one end of the long shaft portion 201, the outer diameter of the tooth portion 202 is larger than that of the long shaft portion 201, and an abutment end surface 2021 is formed at one end of the tooth portion 202 opposite to the long shaft portion 201. In this embodiment, the abutting end 2021 is a plane.
When the side gear 200 is fitted to the differential case 100, the long shaft portion 201 is located in the insertion portion 12, the outer wall of the long shaft portion 201 faces the wear-reducing coating 22 of the steel-backed composite bushing 2, lubricating oil is stored in the wear-reducing coating 22, a layer of lubricating oil is formed on the surface of the wear-reducing coating 22, and the long shaft portion 201 reduces wear with respect to the differential case 100 during axial movement and circumferential rotation. In addition, the abutment end surface 2021 of the tooth portion 202 of the side gear 200 may abut on the spacer 3 and be positioned by contact with the spacer 3.
Automobile differential case 100 have following advantage:
the steel back composite bush 2 capable of storing lubricating oil is arranged, so that the lubricating effect between the steel back composite bush and the side gear 200 is realized;
the steel back composite bushing 2 is of a C shape, can be in interference fit in the limiting structure 121 of the shell 1, and when the steel back composite bushing 2 is located in the limiting structure 121, the opening 20 is closed and forms a circumferential inner wall, so that the thickness of the lubricating oil layer is uniform.
The utility model also discloses a differential mechanism, it includes differential mechanism shell 100, side gear 200, planetary gear constitutes, differential mechanism shell 100 includes casing 1, has basal portion 11 and insert 12, and basal portion 11 is close to the one end of insert 12 and forms step surface 111, forms limit structure 121 on the inner wall of insert 12; the steel back composite bushing 2 is arranged in the limiting structure 121 along the radial direction and the axial direction, and a lubricating oil layer can be formed on the inner wall of the steel back composite bushing 2; and a gasket 3 provided on the step surface 111. The side gear 200 includes a long shaft portion 201 and a tooth portion 202, the tooth portion 202 is formed at one end of the long shaft portion 201, an outer diameter of the tooth portion 202 is larger than an outer diameter of the long shaft portion 201, and the tooth portion 202 forms an abutment end surface 2021 with respect to one end of the long shaft portion 201. When the side gear 200 is fitted to the differential case 100, the long shaft portion 201 is positioned in the insertion portion 12, the outer wall of the long shaft portion 201 faces the steel-backed composite bushing 2, and a lubricating oil layer is formed therebetween, so that the long shaft 201 reduces wear with respect to the differential case 100 during axial and circumferential movements. In addition, the abutment end surface 2021 of the tooth portion 202 of the side gear 200 may abut on the spacer 3 and be positioned by contact with the spacer 3.
The power of the engine enters the differential through the transmission shaft to directly drive the differential shell 100, and then the planetary gears drive the half axle gears 200 on the left and right sides to respectively drive the left and right wheels. The design requirements of the differential are met: (left half-shaft rotation speed) + (right half-shaft rotation speed) ═ 2 (planet carrier rotation speed). When the automobile runs straight, the rotating speeds of the left wheel, the right wheel and the planet wheel carrier are equal and are in a balanced state, and the balanced state of the left wheel, the right wheel and the planet wheel carrier is damaged when the automobile turns, so that the rotating speed of the inner side wheel is reduced, and the rotating speed of the outer side wheel is increased.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An automotive differential including a differential case (100) and a side gear (200), the side gear (200) being rotatably inserted in the differential case (100), characterized in that the differential case (100) comprises:
the shell (1) is provided with a base part (11) and an insertion part (12), one end of the base part (11) connected with the insertion part (12) forms a step surface (111), and a limiting structure (121) is arranged on the inner wall of the insertion part (12);
the steel-backed composite bushing (2) is arranged in the limiting structure (121) along the radial direction and the axial direction;
a gasket (3) provided on the step surface (111);
one end of the side gear (200) abuts against the step surface (111) through the gasket (3), and a lubricating oil layer can be formed by the other end of the side gear (200) and the inner wall of the steel-backed composite bushing (2).
2. The automotive differential of claim 1, characterized in that the insertion portion (12) has an insertion end (12A) and a protruding end (12B) close to the base portion (11), the inner edge of the insertion end (12A) being radially recessed a first distance to form an annular groove, the bottom of the annular groove extending axially towards the base portion (11) a second distance eventually forming the stop structure (121), the length of the second distance being smaller than the length of the insertion portion (12).
3. The automotive differential according to claim 2, characterized in that the steel-backed composite bush (2) is C-shaped and has an opening (20), the steel-backed composite bush (2) being interference-fitted in the limit structure (121).
4. The automotive differential according to claim 3, characterized in that the opening (20) is closed when the steel-backed composite bush (2) is interference-fitted in the limit structure (121).
5. The automotive differential of claim 4, characterized in that the wall thickness of the steel-backed composite sleeve (2) is equal to the first distance and the length of the steel-backed composite sleeve (2) is equal to the second distance.
6. The automotive differential of claim 5, characterized in that the steel backing composite bushing (2) comprises a steel backing (21) and an antifriction coating (22), the outer circumferential surface of the steel backing (21) can abut against the inner wall of the limiting structure (121), and the antifriction coating (22) is arranged on the inner circumferential surface of the steel backing (21).
7. The automotive differential according to claim 6, characterized in that the circumferential surface of the friction reducing coating (22) facing away from the steel backing (21) is formed with a plurality of lubrication grooves (221), the lubrication grooves (221) storing lubrication oil.
8. The automotive differential of claim 7, characterized in that the oil groove (221) is a circular groove.
9. The automotive differential according to claim 3, characterized in that the opening (20) is parallel to the axial direction of the steel-backed composite bush (2).
10. The automotive differential according to claim 9, characterized in that the spacer (3) is provided with a plurality of lubrication holes (31) at circumferentially equiangular intervals, the lubrication holes (31) extending in the axial direction of the spacer (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921254127.0U CN210978432U (en) | 2019-08-05 | 2019-08-05 | Automobile differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921254127.0U CN210978432U (en) | 2019-08-05 | 2019-08-05 | Automobile differential mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210978432U true CN210978432U (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921254127.0U Active CN210978432U (en) | 2019-08-05 | 2019-08-05 | Automobile differential mechanism |
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|---|---|
| CN (1) | CN210978432U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623377A (en) * | 2021-08-23 | 2021-11-09 | 山东蓬翔汽车有限公司 | Inner limiting double anti-drop interaxial differential structure assembly |
-
2019
- 2019-08-05 CN CN201921254127.0U patent/CN210978432U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623377A (en) * | 2021-08-23 | 2021-11-09 | 山东蓬翔汽车有限公司 | Inner limiting double anti-drop interaxial differential structure assembly |
| CN113623377B (en) * | 2021-08-23 | 2024-01-16 | 山东蓬翔汽车有限公司 | Internal limiting double-anti-drop interaxial differential mechanism structure assembly |
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